632621331 has 12 divisors (see below), whose sum is σ = 914060160. Its totient is φ = 421621200.

The previous prime is 632621299. The next prime is 632621393. The reversal of 632621331 is 133126236.

It is a happy number.

632621331 is a `hidden beast` number, since 6 + 3 + 2 + 621 + 3 + 31 = 666.

It is not a de Polignac number, because 632621331 - 2⁵ = 632621299 is a prime.

It is a super-2 number, since 2×632621331² = 800419496872423122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 632621295 and 632621304.

It is not an unprimeable number, because it can be changed into a prime (632623331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28981 + ... + 45881.

It is an arithmetic number, because the mean of its divisors is an integer number (76171680).

Almost surely, 2^632621331 is an apocalyptic number.

632621331 is a deficient number, since it is larger than the sum of its proper divisors (281438829).

632621331 is a wasteful number, since it uses less digits than its factorization.

632621331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21066 (or 21063 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 632621331 is about 25151.9647542692. The cubic root of 632621331 is about 858.4492203182.

Adding to 632621331 its reverse (133126236), we get a palindrome (765747567).

The spelling of 632621331 in words is "six hundred thirty-two million, six hundred twenty-one thousand, three hundred thirty-one".