630565213 has 2 divisors, whose sum is σ = 630565214. Its totient is φ = 630565212.

The previous prime is 630565163. The next prime is 630565237. The reversal of 630565213 is 312565036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496977849 + 133587364 = 22293^2 + 11558^2 .

It is a cyclic number.

It is not a de Polignac number, because 630565213 - 2¹³ = 630557021 is a prime.

It is a super-2 number, since 2×630565213² = 795224975691470738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630565813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315282606 + 315282607.

It is an arithmetic number, because the mean of its divisors is an integer number (315282607).

Almost surely, 2^630565213 is an apocalyptic number.

It is an amenable number.

630565213 is a deficient number, since it is larger than the sum of its proper divisors (1).

630565213 is an equidigital number, since it uses as much as digits as its factorization.

630565213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 630565213 is about 25111.0575842596. The cubic root of 630565213 is about 857.5181796246.

The spelling of 630565213 in words is "six hundred thirty million, five hundred sixty-five thousand, two hundred thirteen".