31845415056 has 160 divisors (see below), whose sum is σ = 102297285888. Its totient is φ = 8312094720.

The previous prime is 31845415051. The next prime is 31845415067. The reversal of 31845415056 is 65051454813.

It is a super-2 number, since 2×31845415056² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 31845414999 and 31845415017.

It is not an unprimeable number, because it can be changed into a prime (31845415051) 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, 386116 + ... + 461276.

Almost surely, 2^31845415056 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 31845415056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51148642944).

31845415056 is an abundant number, since it is smaller than the sum of its proper divisors (70451870832).

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

31845415056 is a wasteful number, since it uses less digits than its factorization.

31845415056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75289 (or 75283 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

Adding to 31845415056 its reverse (65051454813), we get a palindrome (96896869869).

The spelling of 31845415056 in words is "thirty-one billion, eight hundred forty-five million, four hundred fifteen thousand, fifty-six".