31004144140 has 48 divisors (see below), whose sum is σ = 69558451200. Its totient is φ = 11573572032.

The previous prime is 31004144137. The next prime is 31004144161. The reversal of 31004144140 is 4144140013.

It is a super-2 number, since 2×31004144140² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583420 + ... + 634339.

It is an arithmetic number, because the mean of its divisors is an integer number (1449134400).

Almost surely, 2^31004144140 is an apocalyptic number.

It is an amenable number.

31004144140 is an abundant number, since it is smaller than the sum of its proper divisors (38554307060).

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

31004144140 is a wasteful number, since it uses less digits than its factorization.

31004144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217854 (or 1217852 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31004144140 its reverse (4144140013), we get a palindrome (35148284153).

The spelling of 31004144140 in words is "thirty-one billion, four million, one hundred forty-four thousand, one hundred forty".