51143256 has 24 divisors (see below), whose sum is σ = 138513180. Its totient is φ = 17047728.

The previous prime is 51143233. The next prime is 51143291. The reversal of 51143256 is 65234115.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355090 + ... + 355233.

Almost surely, 2^51143256 is an apocalyptic number.

It is an amenable number.

51143256 is an abundant number, since it is smaller than the sum of its proper divisors (87369924).

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

51143256 is a wasteful number, since it uses less digits than its factorization.

51143256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710335 (or 710328 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51143256 is about 7151.4513212354. The cubic root of 51143256 is about 371.1898776904.

The spelling of 51143256 in words is "fifty-one million, one hundred forty-three thousand, two hundred fifty-six".