51340515 has 16 divisors (see below), whose sum is σ = 82251168. Its totient is φ = 27346176.

The previous prime is 51340511. The next prime is 51340519. The reversal of 51340515 is 51504315.

It is an interprime number because it is at equal distance from previous prime (51340511) and next prime (51340519).

It is not a de Polignac number, because 51340515 - 2² = 51340511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51340511) 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, 13239 + ... + 16671.

It is an arithmetic number, because the mean of its divisors is an integer number (5140698).

Almost surely, 2^51340515 is an apocalyptic number.

51340515 is a deficient number, since it is larger than the sum of its proper divisors (30910653).

51340515 is a wasteful number, since it uses less digits than its factorization.

51340515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51340515 is about 7165.2295845981. The cubic root of 51340515 is about 371.6664906012. Note that the first 3 decimals are identical.

The spelling of 51340515 in words is "fifty-one million, three hundred forty thousand, five hundred fifteen".