55452521 has 16 divisors (see below), whose sum is σ = 61125120. Its totient is φ = 50077440.

The previous prime is 55452511. The next prime is 55452533. The reversal of 55452521 is 12525455.

55452521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55452521 - 2²² = 51258217 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 (55452511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72875 + ... + 73631.

It is an arithmetic number, because the mean of its divisors is an integer number (3820320).

Almost surely, 2^55452521 is an apocalyptic number.

It is an amenable number.

55452521 is a deficient number, since it is larger than the sum of its proper divisors (5672599).

55452521 is a wasteful number, since it uses less digits than its factorization.

55452521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its digits is 10000, while the sum is 29.

The square root of 55452521 is about 7446.6449492372. The cubic root of 55452521 is about 381.3353779585.

Adding to 55452521 its reverse (12525455), we get a palindrome (67977976).

The spelling of 55452521 in words is "fifty-five million, four hundred fifty-two thousand, five hundred twenty-one".