623242431 has 40 divisors (see below), whose sum is σ = 1110303744. Its totient is φ = 340647120.

The previous prime is 623242421. The next prime is 623242441. The reversal of 623242431 is 134242326.

623242431 is a `hidden beast` number, since 6 + 232 + 424 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (623242421) and next prime (623242441).

It is not a de Polignac number, because 623242431 - 2⁹ = 623241919 is a prime.

It is a super-2 number, since 2×623242431² = 776862255597579522, 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 = 623242395 and 623242404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623242421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10855 + ... + 36936.

Almost surely, 2^623242431 is an apocalyptic number.

623242431 is a deficient number, since it is larger than the sum of its proper divisors (487061313).

623242431 is a wasteful number, since it uses less digits than its factorization.

623242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47833 (or 47824 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 623242431 is about 24964.8238728015. The cubic root of 623242431 is about 854.1857807258.

Adding to 623242431 its reverse (134242326), we get a palindrome (757484757).

The spelling of 623242431 in words is "six hundred twenty-three million, two hundred forty-two thousand, four hundred thirty-one".