31002231040 has 144 divisors (see below), whose sum is σ = 81123710976. Its totient is φ = 11257856000.

The previous prime is 31002231023. The next prime is 31002231053. The reversal of 31002231040 is 4013220013.

It is a happy number.

It is a super-2 number, since 2×31002231040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16205124 + ... + 16207036.

It is an arithmetic number, because the mean of its divisors is an integer number (563359104).

Almost surely, 2^31002231040 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 31002231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40561855488).

31002231040 is an abundant number, since it is smaller than the sum of its proper divisors (50121479936).

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

31002231040 is a wasteful number, since it uses less digits than its factorization.

31002231040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31002231040 its reverse (4013220013), we get a palindrome (35015451053).

The spelling of 31002231040 in words is "thirty-one billion, two million, two hundred thirty-one thousand, forty".