51136536 has 48 divisors (see below), whose sum is σ = 140527800. Its totient is φ = 15495040.

The previous prime is 51136511. The next prime is 51136537. The reversal of 51136536 is 63563115.

It is a super-2 number, since 2×51136536² = 5229890628158592, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51136537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5901 + ... + 11708.

Almost surely, 2^51136536 is an apocalyptic number.

It is an amenable number.

51136536 is an abundant number, since it is smaller than the sum of its proper divisors (89391264).

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

51136536 is a wasteful number, since it uses less digits than its factorization.

51136536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17640 (or 17625 counting only the distinct ones).

The product of its digits is 8100, while the sum is 30.

The square root of 51136536 is about 7150.9814710989. The cubic root of 51136536 is about 371.1736194032.

The spelling of 51136536 in words is "fifty-one million, one hundred thirty-six thousand, five hundred thirty-six".