51245136 has 50 divisors (see below), whose sum is σ = 148322042. Its totient is φ = 17081280.

The previous prime is 51245107. The next prime is 51245141. The reversal of 51245136 is 63154215.

It can be written as a sum of positive squares in only one way, i.e., 27625536 + 23619600 = 5256^2 + 4860^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 18475 + ... + 21066.

Almost surely, 2^51245136 is an apocalyptic number.

It is an amenable number.

51245136 is an abundant number, since it is smaller than the sum of its proper divisors (97076906).

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

51245136 is a wasteful number, since it uses less digits than its factorization.

51245136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39561 (or 39546 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51245136 is about 7158.5708070815. The cubic root of 51245136 is about 371.4361906580.

The spelling of 51245136 in words is "fifty-one million, two hundred forty-five thousand, one hundred thirty-six".