51305736 has 32 divisors (see below), whose sum is σ = 130075200. Its totient is φ = 16860480.

The previous prime is 51305731. The next prime is 51305743. The reversal of 51305736 is 63750315.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51305731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13351 + ... + 16758.

It is an arithmetic number, because the mean of its divisors is an integer number (4064850).

Almost surely, 2^51305736 is an apocalyptic number.

It is an amenable number.

51305736 is an abundant number, since it is smaller than the sum of its proper divisors (78769464).

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

51305736 is a wasteful number, since it uses less digits than its factorization.

51305736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30189 (or 30185 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 51305736 is about 7162.8022449318. The cubic root of 51305736 is about 371.5825470932.

The spelling of 51305736 in words is "fifty-one million, three hundred five thousand, seven hundred thirty-six".