54942181 has 12 divisors (see below), whose sum is σ = 67672908. Its totient is φ = 44322432.

The previous prime is 54942179. The next prime is 54942203. The reversal of 54942181 is 18124945.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36409156 + 18533025 = 6034^2 + 4305^2 .

It is not a de Polignac number, because 54942181 - 2¹ = 54942179 is a prime.

It is a super-2 number, since 2×54942181² = 6037286506073522, 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 (54942161) 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, 32146 + ... + 33811.

It is an arithmetic number, because the mean of its divisors is an integer number (5639409).

Almost surely, 2^54942181 is an apocalyptic number.

It is an amenable number.

54942181 is a deficient number, since it is larger than the sum of its proper divisors (12730727).

54942181 is a wasteful number, since it uses less digits than its factorization.

54942181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65988 (or 65981 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 54942181 is about 7412.2993058834. The cubic root of 54942181 is about 380.1619369826.

The spelling of 54942181 in words is "fifty-four million, nine hundred forty-two thousand, one hundred eighty-one".