54567981 has 24 divisors (see below), whose sum is σ = 89354720. Its totient is φ = 31811616.

The previous prime is 54567923. The next prime is 54567991. The reversal of 54567981 is 18976545.

54567981 is a `hidden beast` number, since 5 + 4 + 567 + 9 + 81 = 666.

It is not a de Polignac number, because 54567981 - 2⁶ = 54567917 is a prime.

It is a super-2 number, since 2×54567981² = 5955329100832722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54567991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10051 + ... + 14496.

Almost surely, 2^54567981 is an apocalyptic number.

It is an amenable number.

54567981 is a deficient number, since it is larger than the sum of its proper divisors (34786739).

54567981 is a wasteful number, since it uses less digits than its factorization.

54567981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24585 (or 24582 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 54567981 is about 7387.0143495190. The cubic root of 54567981 is about 379.2969016428.

The spelling of 54567981 in words is "fifty-four million, five hundred sixty-seven thousand, nine hundred eighty-one".