31140434166 has 16 divisors (see below), whose sum is σ = 62286542784. Its totient is φ = 10379198984.

The previous prime is 31140434153. The next prime is 31140434177. The reversal of 31140434166 is 66143404113.

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, 163356 + ... + 298271.

It is an arithmetic number, because the mean of its divisors is an integer number (3892908924).

Almost surely, 2^31140434166 is an apocalyptic number.

31140434166 is an abundant number, since it is smaller than the sum of its proper divisors (31146108618).

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

31140434166 is a wasteful number, since it uses less digits than its factorization.

31140434166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472875.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 31140434166 its reverse (66143404113), we get a palindrome (97283838279).

The spelling of 31140434166 in words is "thirty-one billion, one hundred forty million, four hundred thirty-four thousand, one hundred sixty-six".