54948981 has 16 divisors (see below), whose sum is σ = 77995008. Its totient is φ = 34291200.

The previous prime is 54948977. The next prime is 54948991. The reversal of 54948981 is 18984945.

It is not a de Polignac number, because 54948981 - 2² = 54948977 is a prime.

It is a super-2 number, since 2×54948981² = 6038781025876722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54948981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54948961) 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, 6921 + ... + 12561.

It is an arithmetic number, because the mean of its divisors is an integer number (4874688).

Almost surely, 2^54948981 is an apocalyptic number.

54948981 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54948981 is a deficient number, since it is larger than the sum of its proper divisors (23046027).

54948981 is a wasteful number, since it uses less digits than its factorization.

54948981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852.

The product of its digits is 414720, while the sum is 48.

The square root of 54948981 is about 7412.7579887650. The cubic root of 54948981 is about 380.1776201031.

The spelling of 54948981 in words is "fifty-four million, nine hundred forty-eight thousand, nine hundred eighty-one".