54440581 has 4 divisors (see below), whose sum is σ = 58628332. Its totient is φ = 50252832.

The previous prime is 54440549. The next prime is 54440591. The reversal of 54440581 is 18504445.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18504445 = 5 ⋅3700889.

It can be written as a sum of positive squares in 2 ways, for example, as 35212356 + 19228225 = 5934^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 54440581 - 2⁵ = 54440549 is a prime.

It is a super-2 number, since 2×54440581² = 5927553719235122, 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 (54440501) 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, 2093856 + ... + 2093881.

It is an arithmetic number, because the mean of its divisors is an integer number (14657083).

Almost surely, 2^54440581 is an apocalyptic number.

It is an amenable number.

54440581 is a deficient number, since it is larger than the sum of its proper divisors (4187751).

54440581 is a wasteful number, since it uses less digits than its factorization.

54440581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187750.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 54440581 is about 7378.3860701376. The cubic root of 54440581 is about 379.0014898195.

The spelling of 54440581 in words is "fifty-four million, four hundred forty thousand, five hundred eighty-one".