54523921 has 4 divisors (see below), whose sum is σ = 54680500. Its totient is φ = 54367344.

The previous prime is 54523867. The next prime is 54523933. The reversal of 54523921 is 12932545.

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 17313921 + 37210000 = 4161^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 54523921 - 2¹³ = 54515729 is a prime.

It is a super-2 number, since 2×54523921² = 5945715922428482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54523121) 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, 77766 + ... + 78463.

It is an arithmetic number, because the mean of its divisors is an integer number (13670125).

Almost surely, 2^54523921 is an apocalyptic number.

It is an amenable number.

54523921 is a deficient number, since it is larger than the sum of its proper divisors (156579).

54523921 is a wasteful number, since it uses less digits than its factorization.

54523921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156578.

The product of its digits is 10800, while the sum is 31.

The square root of 54523921 is about 7384.0314869318. The cubic root of 54523921 is about 379.1947885165.

The spelling of 54523921 in words is "fifty-four million, five hundred twenty-three thousand, nine hundred twenty-one".