51818499 has 12 divisors (see below), whose sum is σ = 79252056. Its totient is φ = 32513472.

The previous prime is 51818489. The next prime is 51818513. The reversal of 51818499 is 99481815.

It is not a de Polignac number, because 51818499 - 2¹⁵ = 51785731 is a prime.

It is a super-2 number, since 2×51818499² = 5370313677226002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51818449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169189 + ... + 169494.

It is an arithmetic number, because the mean of its divisors is an integer number (6604338).

Almost surely, 2^51818499 is an apocalyptic number.

51818499 is a deficient number, since it is larger than the sum of its proper divisors (27433557).

51818499 is a wasteful number, since it uses less digits than its factorization.

51818499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338706 (or 338703 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 51818499 is about 7198.5067201469. The cubic root of 51818499 is about 372.8163437355.

The spelling of 51818499 in words is "fifty-one million, eight hundred eighteen thousand, four hundred ninety-nine".