31250000128 has 36 divisors (see below), whose sum is σ = 62577380908. Its totient is φ = 15575040000.

The previous prime is 31250000069. The next prime is 31250000161. The reversal of 31250000128 is 82100005213.

It can be written as a sum of positive squares in 2 ways, for example, as 15623000064 + 15627000064 = 124992^2 + 125008^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31250000099 and 31250000108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114873 + ... + 275128.

Almost surely, 2^31250000128 is an apocalyptic number.

It is an amenable number.

31250000128 is an abundant number, since it is smaller than the sum of its proper divisors (31327380780).

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

31250000128 is an equidigital number, since it uses as much as digits as its factorization.

31250000128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390330 (or 390316 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The spelling of 31250000128 in words is "thirty-one billion, two hundred fifty million, one hundred twenty-eight", and thus it is an aban number.