624303421 has 16 divisors (see below), whose sum is σ = 745924608. Its totient is φ = 510879600.

The previous prime is 624303413. The next prime is 624303439. The reversal of 624303421 is 124303426.

It is not a de Polignac number, because 624303421 - 2³ = 624303413 is a prime.

It is a super-2 number, since 2×624303421² = 779509522944606482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624303221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88536 + ... + 95326.

It is an arithmetic number, because the mean of its divisors is an integer number (46620288).

Almost surely, 2^624303421 is an apocalyptic number.

It is an amenable number.

624303421 is a deficient number, since it is larger than the sum of its proper divisors (121621187).

624303421 is a wasteful number, since it uses less digits than its factorization.

624303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7392.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 624303421 is about 24986.0645360569. The cubic root of 624303421 is about 854.6702197048.

Adding to 624303421 its reverse (124303426), we get a palindrome (748606847).

The spelling of 624303421 in words is "six hundred twenty-four million, three hundred three thousand, four hundred twenty-one".