41553221 has 2 divisors, whose sum is σ = 41553222. Its totient is φ = 41553220.

The previous prime is 41553191. The next prime is 41553223. The reversal of 41553221 is 12235514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40768225 + 784996 = 6385^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 41553221 - 2²² = 37358917 is a prime.

Together with 41553223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41553223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20776610 + 20776611.

It is an arithmetic number, because the mean of its divisors is an integer number (20776611).

Almost surely, 2^41553221 is an apocalyptic number.

It is an amenable number.

41553221 is a deficient number, since it is larger than the sum of its proper divisors (1).

41553221 is an equidigital number, since it uses as much as digits as its factorization.

41553221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 23.

The square root of 41553221 is about 6446.1787905704. The cubic root of 41553221 is about 346.3657158624.

Adding to 41553221 its reverse (12235514), we get a palindrome (53788735).

The spelling of 41553221 in words is "forty-one million, five hundred fifty-three thousand, two hundred twenty-one".