54515881 has 6 divisors (see below), whose sum is σ = 63416490. Its totient is φ = 46727856.

The previous prime is 54515831. The next prime is 54515899. The reversal of 54515881 is 18851545.

It can be written as a sum of positive squares in only one way, i.e., 45158400 + 9357481 = 6720^2 + 3059^2 .

It is a de Polignac number, because none of the positive numbers 2^k-54515881 is a prime.

It is a super-2 number, since 2×54515881² = 5943962562412322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54515881.

It is not an unprimeable number, because it can be changed into a prime (54515801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556236 + ... + 556333.

It is an arithmetic number, because the mean of its divisors is an integer number (10569415).

Almost surely, 2^54515881 is an apocalyptic number.

It is an amenable number.

54515881 is a deficient number, since it is larger than the sum of its proper divisors (8900609).

54515881 is a wasteful number, since it uses less digits than its factorization.

54515881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112583 (or 1112576 counting only the distinct ones).

The product of its digits is 32000, while the sum is 37.

The square root of 54515881 is about 7383.4870488137. The cubic root of 54515881 is about 379.1761491383.

The spelling of 54515881 in words is "fifty-four million, five hundred fifteen thousand, eight hundred eighty-one".