51306880 has 32 divisors (see below), whose sum is σ = 122657040. Its totient is φ = 20522496.

The previous prime is 51306841. The next prime is 51306881. The reversal of 51306880 is 8860315.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51306881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39444 + ... + 40723.

Almost surely, 2^51306880 is an apocalyptic number.

It is an amenable number.

51306880 is an abundant number, since it is smaller than the sum of its proper divisors (71350160).

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

51306880 is an equidigital number, since it uses as much as digits as its factorization.

51306880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80186 (or 80174 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 51306880 is about 7162.8821015008. The cubic root of 51306880 is about 371.5853088850.

The spelling of 51306880 in words is "fifty-one million, three hundred six thousand, eight hundred eighty".