402221441 has 8 divisors (see below), whose sum is σ = 420334464. Its totient is φ = 384506640.

The previous prime is 402221429. The next prime is 402221473. The reversal of 402221441 is 144122204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402221441 - 2¹⁸ = 401959297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402221041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97490 + ... + 101531.

It is an arithmetic number, because the mean of its divisors is an integer number (52541808).

Almost surely, 2^402221441 is an apocalyptic number.

It is an amenable number.

402221441 is a deficient number, since it is larger than the sum of its proper divisors (18113023).

402221441 is a wasteful number, since it uses less digits than its factorization.

402221441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199111.

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

The square root of 402221441 is about 20055.4591321166. The cubic root of 402221441 is about 738.1677589316.

Adding to 402221441 its reverse (144122204), we get a palindrome (546343645).

The spelling of 402221441 in words is "four hundred two million, two hundred twenty-one thousand, four hundred forty-one".