51256536 has 16 divisors (see below), whose sum is σ = 128141400. Its totient is φ = 17085504.

The previous prime is 51256529. The next prime is 51256537. The reversal of 51256536 is 63565215.

It is a junction number, because it is equal to n+sod(n) for n = 51256497 and 51256506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51256537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067821 + ... + 1067868.

Almost surely, 2^51256536 is an apocalyptic number.

It is an amenable number.

51256536 is an abundant number, since it is smaller than the sum of its proper divisors (76884864).

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

51256536 is a wasteful number, since it uses less digits than its factorization.

51256536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135698 (or 2135694 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 51256536 is about 7159.3670111261. The cubic root of 51256536 is about 371.4637318645.

The spelling of 51256536 in words is "fifty-one million, two hundred fifty-six thousand, five hundred thirty-six".