630517225 has 12 divisors (see below), whose sum is σ = 841983436. Its totient is φ = 465612480.

The previous prime is 630517211. The next prime is 630517253. The reversal of 630517225 is 522715036.

It can be written as a sum of positive squares in 6 ways, for example, as 205291584 + 425225641 = 14328^2 + 20621^2 .

It is not a de Polignac number, because 630517225 - 2¹¹ = 630515177 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 969702 + ... + 970351.

Almost surely, 2^630517225 is an apocalyptic number.

630517225 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

630517225 is a deficient number, since it is larger than the sum of its proper divisors (211466211).

630517225 is a wasteful number, since it uses less digits than its factorization.

630517225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940076 (or 1940071 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 630517225 is about 25110.1020507683. The cubic root of 630517225 is about 857.4964257941.

The spelling of 630517225 in words is "six hundred thirty million, five hundred seventeen thousand, two hundred twenty-five".