31123010140 has 12 divisors (see below), whose sum is σ = 65358321336. Its totient is φ = 12449204048.

The previous prime is 31123010123. The next prime is 31123010153. The reversal of 31123010140 is 4101032113.

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, 778075234 + ... + 778075273.

It is an arithmetic number, because the mean of its divisors is an integer number (5446526778).

Almost surely, 2^31123010140 is an apocalyptic number.

It is an amenable number.

31123010140 is an abundant number, since it is smaller than the sum of its proper divisors (34235311196).

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

31123010140 is a wasteful number, since it uses less digits than its factorization.

31123010140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556150516 (or 1556150514 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31123010140 its reverse (4101032113), we get a palindrome (35224042253).

The spelling of 31123010140 in words is "thirty-one billion, one hundred twenty-three million, ten thousand, one hundred forty".