54727521 has 4 divisors (see below), whose sum is σ = 72970032. Its totient is φ = 36485012.

The previous prime is 54727513. The next prime is 54727523. The reversal of 54727521 is 12572745.

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 54727521 - 2³ = 54727513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54727523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9121251 + ... + 9121256.

It is an arithmetic number, because the mean of its divisors is an integer number (18242508).

Almost surely, 2^54727521 is an apocalyptic number.

It is an amenable number.

54727521 is a deficient number, since it is larger than the sum of its proper divisors (18242511).

54727521 is a wasteful number, since it uses less digits than its factorization.

54727521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18242510.

The product of its digits is 19600, while the sum is 33.

The square root of 54727521 is about 7397.8051474745. The cubic root of 54727521 is about 379.6661911562. Note that the first 3 decimals are identical.

The spelling of 54727521 in words is "fifty-four million, seven hundred twenty-seven thousand, five hundred twenty-one".