51042615 has 16 divisors (see below), whose sum is σ = 87950688. Its totient is φ = 25128576.

The previous prime is 51042613. The next prime is 51042617. The reversal of 51042615 is 51624015.

It is an interprime number because it is at equal distance from previous prime (51042613) and next prime (51042617).

It is not a de Polignac number, because 51042615 - 2¹ = 51042613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51042613) 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, 130684 + ... + 131073.

It is an arithmetic number, because the mean of its divisors is an integer number (5496918).

Almost surely, 2^51042615 is an apocalyptic number.

51042615 is a deficient number, since it is larger than the sum of its proper divisors (36908073).

51042615 is a wasteful number, since it uses less digits than its factorization.

51042615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261778.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51042615 is about 7144.4114523171. The cubic root of 51042615 is about 370.9462388467.

The spelling of 51042615 in words is "fifty-one million, forty-two thousand, six hundred fifteen".