31144020412 has 12 divisors (see below), whose sum is σ = 56871689616. Its totient is φ = 14894966240.

The previous prime is 31144020409. The next prime is 31144020473. The reversal of 31144020412 is 21402044113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169260889 + ... + 169261072.

It is an arithmetic number, because the mean of its divisors is an integer number (4739307468).

Almost surely, 2^31144020412 is an apocalyptic number.

It is an amenable number.

31144020412 is a deficient number, since it is larger than the sum of its proper divisors (25727669204).

31144020412 is a wasteful number, since it uses less digits than its factorization.

31144020412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338521988 (or 338521986 counting only the distinct ones).

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

Adding to 31144020412 its reverse (21402044113), we get a palindrome (52546064525).

The spelling of 31144020412 in words is "thirty-one billion, one hundred forty-four million, twenty thousand, four hundred twelve".