31553212144 has 40 divisors (see below), whose sum is σ = 64446589440. Its totient is φ = 14924276928.

The previous prime is 31553212139. The next prime is 31553212211. The reversal of 31553212144 is 44121235513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131649 + ... + 283615.

It is an arithmetic number, because the mean of its divisors is an integer number (1611164736).

Almost surely, 2^31553212144 is an apocalyptic number.

It is an amenable number.

31553212144 is an abundant number, since it is smaller than the sum of its proper divisors (32893377296).

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

31553212144 is a wasteful number, since it uses less digits than its factorization.

31553212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152677 (or 152671 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Adding to 31553212144 its reverse (44121235513), we get a palindrome (75674447657).

The spelling of 31553212144 in words is "thirty-one billion, five hundred fifty-three million, two hundred twelve thousand, one hundred forty-four".