51489552 has 40 divisors (see below), whose sum is σ = 133357536. Its totient is φ = 17118976.

The previous prime is 51489539. The next prime is 51489623. The reversal of 51489552 is 25598415.

It is a self number, because there is not a number n which added to its sum of digits gives 51489552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21268 + ... + 23564.

Almost surely, 2^51489552 is an apocalyptic number.

It is an amenable number.

51489552 is an abundant number, since it is smaller than the sum of its proper divisors (81867984).

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

51489552 is a wasteful number, since it uses less digits than its factorization.

51489552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2769 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 51489552 is about 7175.6220636263. The cubic root of 51489552 is about 372.0257815407.

The spelling of 51489552 in words is "fifty-one million, four hundred eighty-nine thousand, five hundred fifty-two".