51980591 has 16 divisors (see below), whose sum is σ = 57254400. Its totient is φ = 46902240.

The previous prime is 51980531. The next prime is 51980603. The reversal of 51980591 is 19508915.

51980591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51980591 - 2⁶ = 51980527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51980531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183536 + ... + 183818.

It is an arithmetic number, because the mean of its divisors is an integer number (3578400).

Almost surely, 2^51980591 is an apocalyptic number.

51980591 is a deficient number, since it is larger than the sum of its proper divisors (5273809).

51980591 is a wasteful number, since it uses less digits than its factorization.

51980591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 51980591 is about 7209.7566533136. The cubic root of 51980591 is about 373.2046712431.

The spelling of 51980591 in words is "fifty-one million, nine hundred eighty thousand, five hundred ninety-one".