31111142108 has 24 divisors (see below), whose sum is σ = 57527944320. Its totient is φ = 14680813680.

The previous prime is 31111142057. The next prime is 31111142129. The reversal of 31111142108 is 80124111113.

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, 758258 + ... + 798233.

It is an arithmetic number, because the mean of its divisors is an integer number (2396997680).

Almost surely, 2^31111142108 is an apocalyptic number.

31111142108 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

31111142108 is a deficient number, since it is larger than the sum of its proper divisors (26416802212).

31111142108 is a wasteful number, since it uses less digits than its factorization.

31111142108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556777 (or 1556775 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

The spelling of 31111142108 in words is "thirty-one billion, one hundred eleven million, one hundred forty-two thousand, one hundred eight".