441521401 has 2 divisors, whose sum is σ = 441521402. Its totient is φ = 441521400.

The previous prime is 441521393. The next prime is 441521471. The reversal of 441521401 is 104125144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396965776 + 44555625 = 19924^2 + 6675^2 .

It is a cyclic number.

It is not a de Polignac number, because 441521401 - 2³ = 441521393 is a prime.

It is a super-2 number, since 2×441521401² = 389882295082005602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (441521471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220760700 + 220760701.

It is an arithmetic number, because the mean of its divisors is an integer number (220760701).

Almost surely, 2^441521401 is an apocalyptic number.

It is an amenable number.

441521401 is a deficient number, since it is larger than the sum of its proper divisors (1).

441521401 is an equidigital number, since it uses as much as digits as its factorization.

441521401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 441521401 is about 21012.4106422847. The cubic root of 441521401 is about 761.4661224344.

Adding to 441521401 its reverse (104125144), we get a palindrome (545646545).

The spelling of 441521401 in words is "four hundred forty-one million, five hundred twenty-one thousand, four hundred one".