54521 has 2 divisors, whose sum is σ = 54522. Its totient is φ = 54520.

The previous prime is 54517. The next prime is 54539. The reversal of 54521 is 12545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44521 + 10000 = 211^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 54521 - 2² = 54517 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 54521.

It is not a weakly prime, because it can be changed into another prime (54541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27260 + 27261.

It is an arithmetic number, because the mean of its divisors is an integer number (27261).

2⁵⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

54521 is a deficient number, since it is larger than the sum of its proper divisors (1).

54521 is an equidigital number, since it uses as much as digits as its factorization.

54521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 17.

The square root of 54521 is about 233.4973233251. The cubic root of 54521 is about 37.9188016885.

It can be divided in two parts, 54 and 521, that added together give a palindrome (575).

The spelling of 54521 in words is "fifty-four thousand, five hundred twenty-one".