631151325 has 96 divisors (see below), whose sum is σ = 1333248000. Its totient is φ = 286752960.

The previous prime is 631151321. The next prime is 631151327. The reversal of 631151325 is 523151136.

631151325 is a `hidden beast` number, since 631 + 1 + 5 + 1 + 3 + 25 = 666.

It is not a de Polignac number, because 631151325 - 2² = 631151321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631151321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1053376 + ... + 1053974.

It is an arithmetic number, because the mean of its divisors is an integer number (13888000).

Almost surely, 2^631151325 is an apocalyptic number.

It is an amenable number.

631151325 is an abundant number, since it is smaller than the sum of its proper divisors (702096675).

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

631151325 is a wasteful number, since it uses less digits than its factorization.

631151325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 837 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 631151325 is about 25122.7252701613. The cubic root of 631151325 is about 857.7837858046.

The spelling of 631151325 in words is "six hundred thirty-one million, one hundred fifty-one thousand, three hundred twenty-five".