51138576 has 60 divisors (see below), whose sum is σ = 150657520. Its totient is φ = 16148160.

The previous prime is 51138569. The next prime is 51138589. The reversal of 51138576 is 67583115.

51138576 is a `hidden beast` number, since 51 + 1 + 38 + 576 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51138576.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6610 + ... + 12081.

Almost surely, 2^51138576 is an apocalyptic number.

It is an amenable number.

51138576 is an abundant number, since it is smaller than the sum of its proper divisors (99518944).

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

51138576 is a wasteful number, since it uses less digits than its factorization.

51138576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18724 (or 18715 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 51138576 is about 7151.1241074393. The cubic root of 51138576 is about 371.1785551052.

It can be divided in two parts, 5113 and 8576, that added together give a square (13689 = 117²).

The spelling of 51138576 in words is "fifty-one million, one hundred thirty-eight thousand, five hundred seventy-six".