54181971 has 12 divisors (see below), whose sum is σ = 78783120. Its totient is φ = 35881200.

The previous prime is 54181961. The next prime is 54181999. The reversal of 54181971 is 17918145.

54181971 = 264² + 265² + ... + 565².

It is not a de Polignac number, because 54181971 - 2¹⁰ = 54180947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54181921) 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, 18576 + ... + 21293.

It is an arithmetic number, because the mean of its divisors is an integer number (6565260).

Almost surely, 2^54181971 is an apocalyptic number.

54181971 is a deficient number, since it is larger than the sum of its proper divisors (24601149).

54181971 is a wasteful number, since it uses less digits than its factorization.

54181971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40026 (or 40023 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 54181971 is about 7360.8403732183. The cubic root of 54181971 is about 378.4004113417.

The spelling of 54181971 in words is "fifty-four million, one hundred eighty-one thousand, nine hundred seventy-one".