31144551242 has 64 divisors (see below), whose sum is σ = 57349244160. Its totient is φ = 12381659136.

The previous prime is 31144551211. The next prime is 31144551257. The reversal of 31144551242 is 24215544113.

It is a junction number, because it is equal to n+sod(n) for n = 31144551199 and 31144551208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7136153 + ... + 7140515.

It is an arithmetic number, because the mean of its divisors is an integer number (896081940).

Almost surely, 2^31144551242 is an apocalyptic number.

31144551242 is a deficient number, since it is larger than the sum of its proper divisors (26204692918).

31144551242 is a wasteful number, since it uses less digits than its factorization.

31144551242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its digits is 19200, while the sum is 32.

The spelling of 31144551242 in words is "thirty-one billion, one hundred forty-four million, five hundred fifty-one thousand, two hundred forty-two".