51512760 has 160 divisors (see below), whose sum is σ = 186611040. Its totient is φ = 12669696.

The previous prime is 51512719. The next prime is 51512779. The reversal of 51512760 is 6721515.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41509 + ... + 42731.

It is an arithmetic number, because the mean of its divisors is an integer number (1166319).

Almost surely, 2^51512760 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 51512760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93305520).

51512760 is an abundant number, since it is smaller than the sum of its proper divisors (135098280).

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

51512760 is a wasteful number, since it uses less digits than its factorization.

51512760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1246 counting only the distinct ones).

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

The square root of 51512760 is about 7177.2390234686. The cubic root of 51512760 is about 372.0816678136.

The spelling of 51512760 in words is "fifty-one million, five hundred twelve thousand, seven hundred sixty".