51624420 has 48 divisors (see below), whose sum is σ = 150837120. Its totient is φ = 13167616.

The previous prime is 51624409. The next prime is 51624421. The reversal of 51624420 is 2442615.

It is not an unprimeable number, because it can be changed into a prime (51624421) 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, 17325 + ... + 20084.

It is an arithmetic number, because the mean of its divisors is an integer number (3142440).

Almost surely, 2^51624420 is an apocalyptic number.

It is an amenable number.

51624420 is an abundant number, since it is smaller than the sum of its proper divisors (99212700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51624420 is a wasteful number, since it uses less digits than its factorization.

51624420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37444 (or 37442 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 51624420 is about 7185.0135699246. The cubic root of 51624420 is about 372.3503174714.

The spelling of 51624420 in words is "fifty-one million, six hundred twenty-four thousand, four hundred twenty".