31130212228 has 12 divisors (see below), whose sum is σ = 55370951692. Its totient is φ = 15309940320.

The previous prime is 31130212181. The next prime is 31130212277. The reversal of 31130212228 is 82221203113.

It can be written as a sum of positive squares in 2 ways, for example, as 4126520644 + 27003691584 = 64238^2 + 164328^2 .

It is a super-2 number, since 2×31130212228² (a number of 22 digits) contains 22 as substring.

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, 63791175 + ... + 63791662.

Almost surely, 2^31130212228 is an apocalyptic number.

It is an amenable number.

31130212228 is a deficient number, since it is larger than the sum of its proper divisors (24240739464).

31130212228 is a wasteful number, since it uses less digits than its factorization.

31130212228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127582902 (or 127582900 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 31130212228 in words is "thirty-one billion, one hundred thirty million, two hundred twelve thousand, two hundred twenty-eight".