31231540444 has 48 divisors (see below), whose sum is σ = 60082531488. Its totient is φ = 14116048128.

The previous prime is 31231540427. The next prime is 31231540481. The reversal of 31231540444 is 44404513213.

It is a congruent number.

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, 1497174 + ... + 1517890.

It is an arithmetic number, because the mean of its divisors is an integer number (1251719406).

Almost surely, 2^31231540444 is an apocalyptic number.

It is an amenable number.

31231540444 is a deficient number, since it is larger than the sum of its proper divisors (28850991044).

31231540444 is a wasteful number, since it uses less digits than its factorization.

31231540444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21334 (or 21332 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The spelling of 31231540444 in words is "thirty-one billion, two hundred thirty-one million, five hundred forty thousand, four hundred forty-four".