51105015 has 24 divisors (see below), whose sum is σ = 95397120. Its totient is φ = 25159104.

The previous prime is 51105013. The next prime is 51105017. The reversal of 51105015 is 51050115.

It is an interprime number because it is at equal distance from previous prime (51105013) and next prime (51105017).

It is not a de Polignac number, because 51105015 - 2¹ = 51105013 is a prime.

It is a super-2 number, since 2×51105015² = 5223445116300450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43095 + ... + 44264.

It is an arithmetic number, because the mean of its divisors is an integer number (3974880).

Almost surely, 2^51105015 is an apocalyptic number.

51105015 is a deficient number, since it is larger than the sum of its proper divisors (44292105).

51105015 is a wasteful number, since it uses less digits than its factorization.

51105015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87383 (or 87380 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 51105015 is about 7148.7771681596. Note that the first 3 decimals coincide. The cubic root of 51105015 is about 371.0973388587.

The spelling of 51105015 in words is "fifty-one million, one hundred five thousand, fifteen".