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31404223 = 237119231
BaseRepresentation
bin111011111001…
…1000010111111
32012002111111101
41313303002333
531014413343
63041033531
7530634334
oct167630277
965074441
1031404223
11167aa504
12a6258a7
1366771a6
14425698b
152b54e4d
hex1df30bf

31404223 has 8 divisors (see below), whose sum is σ = 33232896. Its totient is φ = 29614200.

The previous prime is 31404211. The next prime is 31404251. The reversal of 31404223 is 32240413.

Adding to 31404223 its reverse (32240413), we get a palindrome (63644636).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31404223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31404223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404323) 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 7 ways as a sum of consecutive naturals, for example, 7983 + ... + 11248.

It is an arithmetic number, because the mean of its divisors is an integer number (4154112).

Almost surely, 231404223 is an apocalyptic number.

31404223 is a deficient number, since it is larger than the sum of its proper divisors (1828673).

31404223 is a wasteful number, since it uses less digits than its factorization.

31404223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31404223 is about 5603.9470911135. The cubic root of 31404223 is about 315.4975692225.

The spelling of 31404223 in words is "thirty-one million, four hundred four thousand, two hundred twenty-three".

Divisors: 1 23 71 1633 19231 442313 1365401 31404223