630533231 has 2 divisors, whose sum is σ = 630533232. Its totient is φ = 630533230.

The previous prime is 630533191. The next prime is 630533249. The reversal of 630533231 is 132335036.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 630533231 - 2¹⁸ = 630271087 is a prime.

It is a super-2 number, since 2×630533231² = 795144310790598722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 630533231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630533251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315266615 + 315266616.

It is an arithmetic number, because the mean of its divisors is an integer number (315266616).

Almost surely, 2^630533231 is an apocalyptic number.

630533231 is a deficient number, since it is larger than the sum of its proper divisors (1).

630533231 is an equidigital number, since it uses as much as digits as its factorization.

630533231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 26.

The square root of 630533231 is about 25110.4207650927. The cubic root of 630533231 is about 857.5036817268.

Adding to 630533231 its reverse (132335036), we get a palindrome (762868267).

The spelling of 630533231 in words is "six hundred thirty million, five hundred thirty-three thousand, two hundred thirty-one".