51480765 has 48 divisors (see below), whose sum is σ = 105775488. Its totient is φ = 23530176.

The previous prime is 51480757. The next prime is 51480791. The reversal of 51480765 is 56708415.

51480765 is a `hidden beast` number, since 514 + 80 + 7 + 65 = 666.

It is not a de Polignac number, because 51480765 - 2³ = 51480757 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5479 + ... + 11531.

It is an arithmetic number, because the mean of its divisors is an integer number (2203656).

Almost surely, 2^51480765 is an apocalyptic number.

It is an amenable number.

51480765 is an abundant number, since it is smaller than the sum of its proper divisors (54294723).

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

51480765 is an equidigital number, since it uses as much as digits as its factorization.

51480765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080 (or 6068 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 51480765 is about 7175.0097560909. The cubic root of 51480765 is about 372.0046175285.

The spelling of 51480765 in words is "fifty-one million, four hundred eighty thousand, seven hundred sixty-five".