51515048 has 16 divisors (see below), whose sum is σ = 104020980. Its totient is φ = 23776128.

The previous prime is 51515047. The next prime is 51515053. The reversal of 51515048 is 84051515.

It can be written as a sum of positive squares in 2 ways, for example, as 42016324 + 9498724 = 6482^2 + 3082^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51515048.

It is not an unprimeable number, because it can be changed into a prime (51515047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247565 + ... + 247772.

Almost surely, 2^51515048 is an apocalyptic number.

It is an amenable number.

51515048 is an abundant number, since it is smaller than the sum of its proper divisors (52505932).

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

51515048 is a wasteful number, since it uses less digits than its factorization.

51515048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495356 (or 495352 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

The square root of 51515048 is about 7177.3984144675. The cubic root of 51515048 is about 372.0871765474.

The spelling of 51515048 in words is "fifty-one million, five hundred fifteen thousand, forty-eight".