441618521 has 2 divisors, whose sum is σ = 441618522. Its totient is φ = 441618520.

The previous prime is 441618517. The next prime is 441618523. The reversal of 441618521 is 125816144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294602896 + 147015625 = 17164^2 + 12125^2 .

It is a cyclic number.

It is not a de Polignac number, because 441618521 - 2² = 441618517 is a prime.

Together with 441618523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (441618523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220809260 + 220809261.

It is an arithmetic number, because the mean of its divisors is an integer number (220809261).

Almost surely, 2^441618521 is an apocalyptic number.

It is an amenable number.

441618521 is a deficient number, since it is larger than the sum of its proper divisors (1).

441618521 is an equidigital number, since it uses as much as digits as its factorization.

441618521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 441618521 is about 21014.7215303939. The cubic root of 441618521 is about 761.5219507347.

The spelling of 441618521 in words is "four hundred forty-one million, six hundred eighteen thousand, five hundred twenty-one".