55468381 has 4 divisors (see below), whose sum is σ = 55489564. Its totient is φ = 55447200.

The previous prime is 55468333. The next prime is 55468397. The reversal of 55468381 is 18386455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18386455 = 5 ⋅3677291.

It can be written as a sum of positive squares in 2 ways, for example, as 38862756 + 16605625 = 6234^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 55468381 - 2²¹ = 53371229 is a prime.

It is a super-2 number, since 2×55468381² = 6153482581522322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55468321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6000 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (13872391).

Almost surely, 2^55468381 is an apocalyptic number.

It is an amenable number.

55468381 is a deficient number, since it is larger than the sum of its proper divisors (21183).

55468381 is a wasteful number, since it uses less digits than its factorization.

55468381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21182.

The product of its digits is 115200, while the sum is 40.

The square root of 55468381 is about 7447.7097822082. The cubic root of 55468381 is about 381.3717297929.

The spelling of 55468381 in words is "fifty-five million, four hundred sixty-eight thousand, three hundred eighty-one".