54408581 has 4 divisors (see below), whose sum is σ = 55435212. Its totient is φ = 53381952.

The previous prime is 54408577. The next prime is 54408583. The reversal of 54408581 is 18580445.

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 38328481 + 16080100 = 6191^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 54408581 - 2² = 54408577 is a prime.

It is a super-2 number, since 2×54408581² = 5920587372867122, 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 (54408583) 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, 513236 + ... + 513341.

It is an arithmetic number, because the mean of its divisors is an integer number (13858803).

Almost surely, 2^54408581 is an apocalyptic number.

It is an amenable number.

54408581 is a deficient number, since it is larger than the sum of its proper divisors (1026631).

54408581 is a wasteful number, since it uses less digits than its factorization.

54408581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026630.

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 54408581 is about 7376.2172554772. The cubic root of 54408581 is about 378.9272166425.

The spelling of 54408581 in words is "fifty-four million, four hundred eight thousand, five hundred eighty-one".