31029211156 has 12 divisors (see below), whose sum is σ = 54337647168. Its totient is φ = 15504169112.

The previous prime is 31029211141. The next prime is 31029211181. The reversal of 31029211156 is 65111292013.

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, 2602426 + ... + 2614321.

It is an arithmetic number, because the mean of its divisors is an integer number (4528137264).

Almost surely, 2^31029211156 is an apocalyptic number.

It is an amenable number.

31029211156 is a deficient number, since it is larger than the sum of its proper divisors (23308436012).

31029211156 is a wasteful number, since it uses less digits than its factorization.

31029211156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218238 (or 5218236 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 31029211156 in words is "thirty-one billion, twenty-nine million, two hundred eleven thousand, one hundred fifty-six".