54820181 has 4 divisors (see below), whose sum is σ = 59037132. Its totient is φ = 50603232.

The previous prime is 54820177. The next prime is 54820217. The reversal of 54820181 is 18102845.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 26357956 = 5335^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 54820181 - 2² = 54820177 is a prime.

It is a super-2 number, since 2×54820181² = 6010504489745522, 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 (54820981) 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, 2108456 + ... + 2108481.

It is an arithmetic number, because the mean of its divisors is an integer number (14759283).

Almost surely, 2^54820181 is an apocalyptic number.

It is an amenable number.

54820181 is a deficient number, since it is larger than the sum of its proper divisors (4216951).

54820181 is a wasteful number, since it uses less digits than its factorization.

54820181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216950.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 54820181 is about 7404.0651671903. The cubic root of 54820181 is about 379.8803432121.

The spelling of 54820181 in words is "fifty-four million, eight hundred twenty thousand, one hundred eighty-one".