51506045 has 16 divisors (see below), whose sum is σ = 64798272. Its totient is φ = 39258240.

The previous prime is 51506041. The next prime is 51506047. The reversal of 51506045 is 54060515.

It is not a de Polignac number, because 51506045 - 2² = 51506041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51506041) 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, 5894 + ... + 11736.

It is an arithmetic number, because the mean of its divisors is an integer number (4049892).

Almost surely, 2^51506045 is an apocalyptic number.

It is an amenable number.

51506045 is a deficient number, since it is larger than the sum of its proper divisors (13292227).

51506045 is a wasteful number, since it uses less digits than its factorization.

51506045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 51506045 is about 7176.7712099523. The cubic root of 51506045 is about 372.0654994120.

The spelling of 51506045 in words is "fifty-one million, five hundred six thousand, forty-five".