621363231 has 20 divisors (see below), whose sum is σ = 936897192. Its totient is φ = 410365008.

The previous prime is 621363187. The next prime is 621363233. The reversal of 621363231 is 132363126.

It is a happy number.

621363231 is a `hidden beast` number, since 6 + 21 + 3 + 632 + 3 + 1 = 666.

It is not a de Polignac number, because 621363231 - 2¹³ = 621355039 is a prime.

It is a super-2 number, since 2×621363231² = 772184529677518722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 621363195 and 621363204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621363233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27180 + ... + 44513.

Almost surely, 2^621363231 is an apocalyptic number.

621363231 is a deficient number, since it is larger than the sum of its proper divisors (315533961).

621363231 is a wasteful number, since it uses less digits than its factorization.

621363231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71812 (or 71803 counting only the distinct ones).

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

The square root of 621363231 is about 24927.1585023243. The cubic root of 621363231 is about 853.3264030233.

The spelling of 621363231 in words is "six hundred twenty-one million, three hundred sixty-three thousand, two hundred thirty-one".