54186813 has 12 divisors (see below), whose sum is σ = 81169088. Its totient is φ = 36124380.

The previous prime is 54186809. The next prime is 54186857. The reversal of 54186813 is 31868145.

It is not a de Polignac number, because 54186813 - 2² = 54186809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54186863) 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, 111253 + ... + 111738.

Almost surely, 2^54186813 is an apocalyptic number.

It is an amenable number.

54186813 is a deficient number, since it is larger than the sum of its proper divisors (26982275).

54186813 is an equidigital number, since it uses as much as digits as its factorization.

54186813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223006 (or 222994 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 54186813 is about 7361.1692685334. The cubic root of 54186813 is about 378.4116829891.

The spelling of 54186813 in words is "fifty-four million, one hundred eighty-six thousand, eight hundred thirteen".