31155511042 has 16 divisors (see below), whose sum is σ = 46948356000. Its totient is φ = 15506136000.

The previous prime is 31155511027. The next prime is 31155511087. The reversal of 31155511042 is 24011555113.

It is a self number, because there is not a number n which added to its sum of digits gives 31155511042.

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, 834634 + ... + 871162.

It is an arithmetic number, because the mean of its divisors is an integer number (2934272250).

Almost surely, 2^31155511042 is an apocalyptic number.

31155511042 is a deficient number, since it is larger than the sum of its proper divisors (15792844958).

31155511042 is a wasteful number, since it uses less digits than its factorization.

31155511042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38481.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 31155511042 in words is "thirty-one billion, one hundred fifty-five million, five hundred eleven thousand, forty-two".