51880136 has 32 divisors (see below), whose sum is σ = 121279680. Its totient is φ = 20212800.

The previous prime is 51880133. The next prime is 51880181. The reversal of 51880136 is 63108815.

It is a super-2 number, since 2×51880136² = 5383097022756992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) 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 (51880133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41495 + ... + 42726.

It is an arithmetic number, because the mean of its divisors is an integer number (3789990).

Almost surely, 2^51880136 is an apocalyptic number.

51880136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51880136 is an abundant number, since it is smaller than the sum of its proper divisors (69399544).

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

51880136 is a wasteful number, since it uses less digits than its factorization.

51880136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84245 (or 84241 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 51880136 is about 7202.7866829443. The cubic root of 51880136 is about 372.9641041964.

The spelling of 51880136 in words is "fifty-one million, eight hundred eighty thousand, one hundred thirty-six".