51015936 has 72 divisors (see below), whose sum is σ = 136898944. Its totient is φ = 16865280.

The previous prime is 51015907. The next prime is 51015949. The reversal of 51015936 is 63951015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138825 + ... + 139191.

Almost surely, 2^51015936 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 51015936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68449472).

51015936 is an abundant number, since it is smaller than the sum of its proper divisors (85883008).

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

51015936 is a wasteful number, since it uses less digits than its factorization.

51015936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 51015936 is about 7142.5440845682. The cubic root of 51015936 is about 370.8815987452.

The spelling of 51015936 in words is "fifty-one million, fifteen thousand, nine hundred thirty-six".