51167520 has 72 divisors (see below), whose sum is σ = 174614076. Its totient is φ = 13644288.

The previous prime is 51167497. The next prime is 51167521. The reversal of 51167520 is 2576115.

It can be written as a sum of positive squares in 2 ways, for example, as 44997264 + 6170256 = 6708^2 + 2484^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (51167521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16327 + ... + 19206.

Almost surely, 2^51167520 is an apocalyptic number.

It is an amenable number.

51167520 is an abundant number, since it is smaller than the sum of its proper divisors (123446556).

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

51167520 is a wasteful number, since it uses less digits than its factorization.

51167520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35554 (or 35543 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 51167520 is about 7153.1475589421. The cubic root of 51167520 is about 371.2485698683.

The spelling of 51167520 in words is "fifty-one million, one hundred sixty-seven thousand, five hundred twenty".