51255880 has 64 divisors (see below), whose sum is σ = 125017200. Its totient is φ = 18800640.

The previous prime is 51255877. The next prime is 51255887. The reversal of 51255880 is 8855215.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 31203396 + 20052484 = 5586^2 + 4478^2 .

It is not an unprimeable number, because it can be changed into a prime (51255887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125116 + ... + 125524.

Almost surely, 2^51255880 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 51255880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62508600).

51255880 is an abundant number, since it is smaller than the sum of its proper divisors (73761320).

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

51255880 is a wasteful number, since it uses less digits than its factorization.

51255880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 51255880 is about 7159.3211968733. The cubic root of 51255880 is about 371.4621471479.

The spelling of 51255880 in words is "fifty-one million, two hundred fifty-five thousand, eight hundred eighty".