51812760 has 64 divisors (see below), whose sum is σ = 156854880. Its totient is φ = 13690880.

The previous prime is 51812759. The next prime is 51812771. The reversal of 51812760 is 6721815.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11650 + ... + 15470.

Almost surely, 2^51812760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51812760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78427440).

51812760 is an abundant number, since it is smaller than the sum of its proper divisors (105042120).

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

51812760 is a wasteful number, since it uses less digits than its factorization.

51812760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948 (or 3944 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 51812760 is about 7198.1080847678. The cubic root of 51812760 is about 372.8025798479.

The spelling of 51812760 in words is "fifty-one million, eight hundred twelve thousand, seven hundred sixty".