631251047 has 16 divisors (see below), whose sum is σ = 762875904. Its totient is φ = 510840000.

The previous prime is 631251013. The next prime is 631251097. The reversal of 631251047 is 740152136.

It is a cyclic number.

It is not a de Polignac number, because 631251047 - 2²⁰ = 630202471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631251097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26579 + ... + 44372.

It is an arithmetic number, because the mean of its divisors is an integer number (47679744).

Almost surely, 2^631251047 is an apocalyptic number.

631251047 is a deficient number, since it is larger than the sum of its proper divisors (131624857).

631251047 is a wasteful number, since it uses less digits than its factorization.

631251047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71030.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 631251047 is about 25124.7098888723. The cubic root of 631251047 is about 857.8289600793.

The spelling of 631251047 in words is "six hundred thirty-one million, two hundred fifty-one thousand, forty-seven".