51980499 has 24 divisors (see below), whose sum is σ = 78686400. Its totient is φ = 33022080.

The previous prime is 51980491. The next prime is 51980519. The reversal of 51980499 is 99408915.

It is not a de Polignac number, because 51980499 - 2³ = 51980491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51980491) 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, 19359 + ... + 21879.

It is an arithmetic number, because the mean of its divisors is an integer number (3278600).

Almost surely, 2^51980499 is an apocalyptic number.

51980499 is a deficient number, since it is larger than the sum of its proper divisors (26705901).

51980499 is a wasteful number, since it uses less digits than its factorization.

51980499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2632 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 51980499 is about 7209.7502730677. The cubic root of 51980499 is about 373.2044510658.

It can be divided in two parts, 519 and 80499, that added together give a palindrome (81018).

The spelling of 51980499 in words is "fifty-one million, nine hundred eighty thousand, four hundred ninety-nine".