51517895 has 16 divisors (see below), whose sum is σ = 72630432. Its totient is φ = 34584960.

The previous prime is 51517883. The next prime is 51517903. The reversal of 51517895 is 59871515.

It is not a de Polignac number, because 51517895 - 2⁶ = 51517831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35312 + ... + 36741.

It is an arithmetic number, because the mean of its divisors is an integer number (4539402).

Almost surely, 2^51517895 is an apocalyptic number.

51517895 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51517895 is a deficient number, since it is larger than the sum of its proper divisors (21112537).

51517895 is a wasteful number, since it uses less digits than its factorization.

51517895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72082.

The product of its digits is 63000, while the sum is 41.

The square root of 51517895 is about 7177.5967426430. The cubic root of 51517895 is about 372.0940309373.

The spelling of 51517895 in words is "fifty-one million, five hundred seventeen thousand, eight hundred ninety-five".