55733181 has 16 divisors (see below), whose sum is σ = 85123584. Its totient is φ = 31773744.

The previous prime is 55733179. The next prime is 55733201. The reversal of 55733181 is 18133755.

It is not a de Polignac number, because 55733181 - 2¹ = 55733179 is a prime.

It is a super-2 number, since 2×55733181² = 6212374928757522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55733101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6966 + ... + 12648.

It is an arithmetic number, because the mean of its divisors is an integer number (5320224).

Almost surely, 2^55733181 is an apocalyptic number.

It is an amenable number.

55733181 is a deficient number, since it is larger than the sum of its proper divisors (29390403).

55733181 is a wasteful number, since it uses less digits than its factorization.

55733181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160.

The product of its digits is 12600, while the sum is 33.

The square root of 55733181 is about 7465.4658930304. The cubic root of 55733181 is about 381.9776423050.

The spelling of 55733181 in words is "fifty-five million, seven hundred thirty-three thousand, one hundred eighty-one".