51260515 has 16 divisors (see below), whose sum is σ = 64982016. Its totient is φ = 38757600.

The previous prime is 51260507. The next prime is 51260519. The reversal of 51260515 is 51506215.

It is not a de Polignac number, because 51260515 - 2³ = 51260507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51260515.

It is not an unprimeable number, because it can be changed into a prime (51260519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2820 + ... + 10510.

It is an arithmetic number, because the mean of its divisors is an integer number (4061376).

Almost surely, 2^51260515 is an apocalyptic number.

51260515 is a deficient number, since it is larger than the sum of its proper divisors (13721501).

51260515 is a wasteful number, since it uses less digits than its factorization.

51260515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51260515 is about 7159.6448934287. The cubic root of 51260515 is about 371.4733437505.

The spelling of 51260515 in words is "fifty-one million, two hundred sixty thousand, five hundred fifteen".