55286181 has 24 divisors (see below), whose sum is σ = 87721920. Its totient is φ = 33397056.

The previous prime is 55286171. The next prime is 55286183. The reversal of 55286181 is 18168255.

It is not a de Polignac number, because 55286181 - 2⁶ = 55286117 is a prime.

It is a super-2 number, since 2×55286181² = 6113123619129522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55286183) 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, 3096 + ... + 10961.

It is an arithmetic number, because the mean of its divisors is an integer number (3655080).

Almost surely, 2^55286181 is an apocalyptic number.

It is an amenable number.

55286181 is a deficient number, since it is larger than the sum of its proper divisors (32435739).

55286181 is a wasteful number, since it uses less digits than its factorization.

55286181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105 (or 14102 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 55286181 is about 7435.4677727766. The cubic root of 55286181 is about 380.9537009481.

The spelling of 55286181 in words is "fifty-five million, two hundred eighty-six thousand, one hundred eighty-one".