31042656 has 192 divisors, whose sum is σ = 99993600. Its totient is φ = 9331200.

The previous prime is 31042651. The next prime is 31042681. The reversal of 31042656 is 65624013.

31042656 is a `hidden beast` number, since 3 + 1 + 0 + 4 + 2 + 656 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 508866 + ... + 508926.

It is an arithmetic number, because the mean of its divisors is an integer number (520800).

Almost surely, 2^31042656 is an apocalyptic number.

31042656 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31042656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49996800).

31042656 is an abundant number, since it is smaller than the sum of its proper divisors (68950944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31042656 is a wasteful number, since it uses less digits than its factorization.

31042656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 31042656 is about 5571.5936678835. The cubic root of 31042656 is about 314.2820838620.

Adding to 31042656 its reverse (65624013), we get a palindrome (96666669).

The spelling of 31042656 in words is "thirty-one million, forty-two thousand, six hundred fifty-six".