31512754745 has 4 divisors (see below), whose sum is σ = 37815305700. Its totient is φ = 25210203792.

The previous prime is 31512754717. The next prime is 31512754753. The reversal of 31512754745 is 54745721513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5774328121 + 25738426624 = 75989^2 + 160432^2 .

It is a cyclic number.

It is not a de Polignac number, because 31512754745 - 2²⁴ = 31495977529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31512754696 and 31512754705.

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, 3151275470 + ... + 3151275479.

It is an arithmetic number, because the mean of its divisors is an integer number (9453826425).

Almost surely, 2^31512754745 is an apocalyptic number.

It is an amenable number.

31512754745 is a deficient number, since it is larger than the sum of its proper divisors (6302550955).

31512754745 is an equidigital number, since it uses as much as digits as its factorization.

31512754745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6302550954.

The product of its digits is 588000, while the sum is 44.

The spelling of 31512754745 in words is "thirty-one billion, five hundred twelve million, seven hundred fifty-four thousand, seven hundred forty-five".