51489624 has 16 divisors (see below), whose sum is σ = 128724120. Its totient is φ = 17163200.

The previous prime is 51489623. The next prime is 51489629. The reversal of 51489624 is 42698415.

It is a super-2 number, since 2×51489624² = 5302362759322752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072677 + ... + 1072724.

Almost surely, 2^51489624 is an apocalyptic number.

It is an amenable number.

51489624 is an abundant number, since it is smaller than the sum of its proper divisors (77234496).

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

51489624 is a wasteful number, since it uses less digits than its factorization.

51489624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145410 (or 2145406 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 51489624 is about 7175.6270806111. The cubic root of 51489624 is about 372.0259549471.

The spelling of 51489624 in words is "fifty-one million, four hundred eighty-nine thousand, six hundred twenty-four".