31420113 has 4 divisors (see below), whose sum is σ = 41893488. Its totient is φ = 20946740.

The previous prime is 31420099. The next prime is 31420133. The reversal of 31420113 is 31102413.

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.

It is a cyclic number.

It is not a de Polignac number, because 31420113 - 2⁹ = 31419601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31420092 and 31420101.

It is not an unprimeable number, because it can be changed into a prime (31420133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5236683 + ... + 5236688.

It is an arithmetic number, because the mean of its divisors is an integer number (10473372).

Almost surely, 2^31420113 is an apocalyptic number.

It is an amenable number.

31420113 is a deficient number, since it is larger than the sum of its proper divisors (10473375).

31420113 is a wasteful number, since it uses less digits than its factorization.

31420113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473374.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31420113 is about 5605.3646625353. The cubic root of 31420113 is about 315.5507723758.

Adding to 31420113 its reverse (31102413), we get a palindrome (62522526).

The spelling of 31420113 in words is "thirty-one million, four hundred twenty thousand, one hundred thirteen".