624534421 has 16 divisors (see below), whose sum is σ = 724172800. Its totient is φ = 527527728.

The previous prime is 624534377. The next prime is 624534437. The reversal of 624534421 is 124435426.

624534421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 624534421 - 2¹⁷ = 624403349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624534461) 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, 487660 + ... + 488938.

It is an arithmetic number, because the mean of its divisors is an integer number (45260800).

Almost surely, 2^624534421 is an apocalyptic number.

It is an amenable number.

624534421 is a deficient number, since it is larger than the sum of its proper divisors (99638379).

624534421 is a wasteful number, since it uses less digits than its factorization.

624534421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248.

The product of its digits is 23040, while the sum is 31.

The square root of 624534421 is about 24990.6866852434. The cubic root of 624534421 is about 854.7756195626.

Adding to 624534421 its reverse (124435426), we get a palindrome (748969847).

The spelling of 624534421 in words is "six hundred twenty-four million, five hundred thirty-four thousand, four hundred twenty-one".