55441521 has 6 divisors (see below), whose sum is σ = 80082210. Its totient is φ = 36961008.

The previous prime is 55441517. The next prime is 55441531. The reversal of 55441521 is 12514455.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 4161600 = 7161^2 + 2040^2 .

It is not a de Polignac number, because 55441521 - 2² = 55441517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55441511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3080076 + ... + 3080093.

It is an arithmetic number, because the mean of its divisors is an integer number (13347035).

Almost surely, 2^55441521 is an apocalyptic number.

It is an amenable number.

55441521 is a deficient number, since it is larger than the sum of its proper divisors (24640689).

55441521 is a wasteful number, since it uses less digits than its factorization.

55441521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160175 (or 6160172 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 55441521 is about 7445.9063249547. The cubic root of 55441521 is about 381.3101613920.

Adding to 55441521 its reverse (12514455), we get a palindrome (67955976).

The spelling of 55441521 in words is "fifty-five million, four hundred forty-one thousand, five hundred twenty-one".