631325155 has 8 divisors (see below), whose sum is σ = 757735200. Its totient is φ = 504963456.

The previous prime is 631325153. The next prime is 631325159. The reversal of 631325155 is 551523136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631325155 - 2¹ = 631325153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631325153) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29931 + ... + 46459.

It is an arithmetic number, because the mean of its divisors is an integer number (94716900).

Almost surely, 2^631325155 is an apocalyptic number.

631325155 is a deficient number, since it is larger than the sum of its proper divisors (126410045).

631325155 is a wasteful number, since it uses less digits than its factorization.

631325155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24173.

The product of its digits is 13500, while the sum is 31.

The square root of 631325155 is about 25126.1846486887. The cubic root of 631325155 is about 857.8625280770.

The spelling of 631325155 in words is "six hundred thirty-one million, three hundred twenty-five thousand, one hundred fifty-five".