631768225 has 27 divisors (see below), whose sum is σ = 862972761. Its totient is φ = 458462400.

The previous prime is 631768223. The next prime is 631768237. The reversal of 631768225 is 522867136.

The square root of 631768225 is 25135.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 43996689 + 587771536 = 6633^2 + 24244^2 .

It is not a de Polignac number, because 631768225 - 2¹ = 631768223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631768223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1382197 + ... + 1382653.

Almost surely, 2^631768225 is an apocalyptic number.

631768225 is the 25135-th square number.

631768225 is the 12568-th centered octagonal number.

It is an amenable number.

631768225 is a deficient number, since it is larger than the sum of its proper divisors (231204536).

631768225 is an equidigital number, since it uses as much as digits as its factorization.

631768225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 473 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The cubic root of 631768225 is about 858.0631665089.

The spelling of 631768225 in words is "six hundred thirty-one million, seven hundred sixty-eight thousand, two hundred twenty-five".