53918181 has 24 divisors (see below), whose sum is σ = 83154240. Its totient is φ = 33566400.

The previous prime is 53918149. The next prime is 53918191. The reversal of 53918181 is 18181935.

It is not a de Polignac number, because 53918181 - 2⁵ = 53918149 is a prime.

It is a super-2 number, since 2×53918181² = 5814340484697522, which contains 22 as substring.

53918181 is a modest number, since divided by 8181 gives 5391 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53918191) 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, 9921 + ... + 14361.

It is an arithmetic number, because the mean of its divisors is an integer number (3464760).

Almost surely, 2^53918181 is an apocalyptic number.

It is an amenable number.

53918181 is a deficient number, since it is larger than the sum of its proper divisors (29236059).

53918181 is a wasteful number, since it uses less digits than its factorization.

53918181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537 (or 4534 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 53918181 is about 7342.9000401749. The cubic root of 53918181 is about 377.7853194349.

The spelling of 53918181 in words is "fifty-three million, nine hundred eighteen thousand, one hundred eighty-one".