51515248 has 40 divisors (see below), whose sum is σ = 103305888. Its totient is φ = 24867072.

The previous prime is 51515227. The next prime is 51515249. The reversal of 51515248 is 84251515.

It is a hoax number, since the sum of its digits (31) 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 (51515249) 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, 102165 + ... + 102667.

Almost surely, 2^51515248 is an apocalyptic number.

It is an amenable number.

51515248 is an abundant number, since it is smaller than the sum of its proper divisors (51790640).

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

51515248 is a wasteful number, since it uses less digits than its factorization.

51515248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 715 counting only the distinct ones).

The product of its digits is 8000, while the sum is 31.

The square root of 51515248 is about 7177.4123470789. The cubic root of 51515248 is about 372.0876580723.

The spelling of 51515248 in words is "fifty-one million, five hundred fifteen thousand, two hundred forty-eight".