54441561 has 4 divisors (see below), whose sum is σ = 72588752. Its totient is φ = 36294372.

The previous prime is 54441553. The next prime is 54441641. The reversal of 54441561 is 16514445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54441561 - 2³ = 54441553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54441521) 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, 9073591 + ... + 9073596.

It is an arithmetic number, because the mean of its divisors is an integer number (18147188).

Almost surely, 2^54441561 is an apocalyptic number.

It is an amenable number.

54441561 is a deficient number, since it is larger than the sum of its proper divisors (18147191).

54441561 is a wasteful number, since it uses less digits than its factorization.

54441561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18147190.

The product of its digits is 9600, while the sum is 30.

The square root of 54441561 is about 7378.4524800259. The cubic root of 54441561 is about 379.0037639761.

The spelling of 54441561 in words is "fifty-four million, four hundred forty-one thousand, five hundred sixty-one".