441402221 has 4 divisors (see below), whose sum is σ = 475356252. Its totient is φ = 407448192.

The previous prime is 441402191. The next prime is 441402233. The reversal of 441402221 is 122204144.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80820100 + 360582121 = 8990^2 + 18989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-441402221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 441402193 and 441402202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441402251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16976996 + ... + 16977021.

It is an arithmetic number, because the mean of its divisors is an integer number (118839063).

Almost surely, 2^441402221 is an apocalyptic number.

It is an amenable number.

441402221 is a deficient number, since it is larger than the sum of its proper divisors (33954031).

441402221 is a wasteful number, since it uses less digits than its factorization.

441402221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33954030.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 441402221 is about 21009.5745078286. The cubic root of 441402221 is about 761.3976020116.

Adding to 441402221 its reverse (122204144), we get a palindrome (563606365).

The spelling of 441402221 in words is "four hundred forty-one million, four hundred two thousand, two hundred twenty-one".