54173521 has 4 divisors (see below), whose sum is σ = 54457344. Its totient is φ = 53889700.

The previous prime is 54173491. The next prime is 54173531. The reversal of 54173521 is 12537145.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 54173521 - 2¹³ = 54165329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54173521.

It is not an unprimeable number, because it can be changed into a prime (54173531) 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, 141625 + ... + 142006.

It is an arithmetic number, because the mean of its divisors is an integer number (13614336).

Almost surely, 2^54173521 is an apocalyptic number.

It is an amenable number.

54173521 is a deficient number, since it is larger than the sum of its proper divisors (283823).

54173521 is a wasteful number, since it uses less digits than its factorization.

54173521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283822.

The product of its digits is 4200, while the sum is 28.

The square root of 54173521 is about 7360.2663674625. The cubic root of 54173521 is about 378.3807390556.

The spelling of 54173521 in words is "fifty-four million, one hundred seventy-three thousand, five hundred twenty-one".