631752131 has 4 divisors (see below), whose sum is σ = 652131264. Its totient is φ = 611373000.

The previous prime is 631752127. The next prime is 631752157. The reversal of 631752131 is 131257136.

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

It is a cyclic number.

It is not a de Polignac number, because 631752131 - 2² = 631752127 is a prime.

It is a super-2 number, since 2×631752131² = 798221510046082322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631752094 and 631752103.

It is not an unprimeable number, because it can be changed into a prime (631752101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10189520 + ... + 10189581.

It is an arithmetic number, because the mean of its divisors is an integer number (163032816).

Almost surely, 2^631752131 is an apocalyptic number.

631752131 is a deficient number, since it is larger than the sum of its proper divisors (20379133).

631752131 is a wasteful number, since it uses less digits than its factorization.

631752131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20379132.

The product of its digits is 3780, while the sum is 29.

The square root of 631752131 is about 25134.6798467774. The cubic root of 631752131 is about 858.0558801944.

The spelling of 631752131 in words is "six hundred thirty-one million, seven hundred fifty-two thousand, one hundred thirty-one".