623505231 has 6 divisors (see below), whose sum is σ = 900618680. Its totient is φ = 415670148.

The previous prime is 623505227. The next prime is 623505257. The reversal of 623505231 is 132505326.

623505231 is a `hidden beast` number, since 623 + 5 + 0 + 5 + 2 + 31 = 666.

It is not a de Polignac number, because 623505231 - 2² = 623505227 is a prime.

It is a super-2 number, since 2×623505231² = 777517546168726722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 623505195 and 623505204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623505271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34639171 + ... + 34639188.

Almost surely, 2^623505231 is an apocalyptic number.

623505231 is a deficient number, since it is larger than the sum of its proper divisors (277113449).

623505231 is a wasteful number, since it uses less digits than its factorization.

623505231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69278365 (or 69278362 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 623505231 is about 24970.0867239183. The cubic root of 623505231 is about 854.3058241565.

The spelling of 623505231 in words is "six hundred twenty-three million, five hundred five thousand, two hundred thirty-one".