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31400113 = 107293459
BaseRepresentation
bin111011111001…
…0000010110001
32012002021212011
41313302002301
531014300423
63041002521
7530616343
oct167620261
965067764
1031400113
11167a7408
12a623441
136675364
144255293
152b53b0d
hex1df20b1

31400113 has 4 divisors (see below), whose sum is σ = 31693680. Its totient is φ = 31106548.

The previous prime is 31400099. The next prime is 31400119. The reversal of 31400113 is 31100413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31100413 = 151205963.

It is a cyclic number.

It is not a de Polignac number, because 31400113 - 25 = 31400081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31400093 and 31400102.

It is not an unprimeable number, because it can be changed into a prime (31400119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146623 + ... + 146836.

It is an arithmetic number, because the mean of its divisors is an integer number (7923420).

Almost surely, 231400113 is an apocalyptic number.

It is an amenable number.

31400113 is a deficient number, since it is larger than the sum of its proper divisors (293567).

31400113 is a wasteful number, since it uses less digits than its factorization.

31400113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293566.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 31400113 is about 5603.5803732971. The cubic root of 31400113 is about 315.4838051333.

Adding to 31400113 its reverse (31100413), we get a palindrome (62500526).

It can be divided in two parts, 31400 and 113, that added together give a palindrome (31513).

The spelling of 31400113 in words is "thirty-one million, four hundred thousand, one hundred thirteen".

Divisors: 1 107 293459 31400113