51251256 has 144 divisors (see below), whose sum is σ = 164502000. Its totient is φ = 14370048.

The previous prime is 51251219. The next prime is 51251269. The reversal of 51251256 is 65215215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 257445 + ... + 257643.

It is an arithmetic number, because the mean of its divisors is an integer number (1142375).

Almost surely, 2^51251256 is an apocalyptic number.

51251256 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51251256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82251000).

51251256 is an abundant number, since it is smaller than the sum of its proper divisors (113250744).

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

51251256 is a wasteful number, since it uses less digits than its factorization.

51251256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 284 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51251256 is about 7158.9982539459. The cubic root of 51251256 is about 371.4509764450.

The spelling of 51251256 in words is "fifty-one million, two hundred fifty-one thousand, two hundred fifty-six".