51520572 has 18 divisors (see below), whose sum is σ = 130232648. Its totient is φ = 17173512.

The previous prime is 51520499. The next prime is 51520583. The reversal of 51520572 is 27502515.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715528 + ... + 715599.

Almost surely, 2^51520572 is an apocalyptic number.

It is an amenable number.

51520572 is an abundant number, since it is smaller than the sum of its proper divisors (78712076).

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

51520572 is a wasteful number, since it uses less digits than its factorization.

51520572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431137 (or 1431132 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51520572 is about 7177.7832232521. The cubic root of 51520572 is about 372.1004758077.

The spelling of 51520572 in words is "fifty-one million, five hundred twenty thousand, five hundred seventy-two".