51658945 has 16 divisors (see below), whose sum is σ = 67173120. Its totient is φ = 37911744.

The previous prime is 51658921. The next prime is 51658949. The reversal of 51658945 is 54985615.

It is not a de Polignac number, because 51658945 - 2⁵ = 51658913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51658949) 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, 8476 + ... + 13234.

It is an arithmetic number, because the mean of its divisors is an integer number (4198320).

Almost surely, 2^51658945 is an apocalyptic number.

It is an amenable number.

51658945 is a deficient number, since it is larger than the sum of its proper divisors (15514175).

51658945 is a wasteful number, since it uses less digits than its factorization.

51658945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944.

The product of its digits is 216000, while the sum is 43.

The square root of 51658945 is about 7187.4157386365. The cubic root of 51658945 is about 372.4333048767.

The spelling of 51658945 in words is "fifty-one million, six hundred fifty-eight thousand, nine hundred forty-five".