31056234440 has 256 divisors, whose sum is σ = 92518848000. Its totient is φ = 9083289600.

The previous prime is 31056234439. The next prime is 31056234479. The reversal of 31056234440 is 4443265013.

It is a super-2 number, since 2×31056234440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31056234397 and 31056234406.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 23508980 + ... + 23510300.

It is an arithmetic number, because the mean of its divisors is an integer number (361401750).

Almost surely, 2^31056234440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31056234440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46259424000).

31056234440 is an abundant number, since it is smaller than the sum of its proper divisors (61462613560).

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

31056234440 is a wasteful number, since it uses less digits than its factorization.

31056234440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816 (or 1812 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 31056234440 its reverse (4443265013), we get a palindrome (35499499453).

The spelling of 31056234440 in words is "thirty-one billion, fifty-six million, two hundred thirty-four thousand, four hundred forty".