51500552 has 8 divisors (see below), whose sum is σ = 96563550. Its totient is φ = 25750272.

The previous prime is 51500539. The next prime is 51500557. The reversal of 51500552 is 25500515.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 148996 = 7166^2 + 386^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51500557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218777 + ... + 3218792.

Almost surely, 2^51500552 is an apocalyptic number.

It is an amenable number.

51500552 is a deficient number, since it is larger than the sum of its proper divisors (45062998).

51500552 is a wasteful number, since it uses less digits than its factorization.

51500552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437575 (or 6437571 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 51500552 is about 7176.3885067630. The cubic root of 51500552 is about 372.0522723015.

The spelling of 51500552 in words is "fifty-one million, five hundred thousand, five hundred fifty-two".