401521222 has 8 divisors (see below), whose sum is σ = 603178776. Its totient is φ = 200461632.

The previous prime is 401521217. The next prime is 401521247. The reversal of 401521222 is 222125104.

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

It is a super-2 number, since 2×401521222² = 322438583432746568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401521222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147808 + ... + 150499.

It is an arithmetic number, because the mean of its divisors is an integer number (75397347).

Almost surely, 2^401521222 is an apocalyptic number.

401521222 is a deficient number, since it is larger than the sum of its proper divisors (201657554).

401521222 is a wasteful number, since it uses less digits than its factorization.

401521222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298982.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 401521222 is about 20037.9944605242. The cubic root of 401521222 is about 737.7391564512.

Adding to 401521222 its reverse (222125104), we get a palindrome (623646326).

The spelling of 401521222 in words is "four hundred one million, five hundred twenty-one thousand, two hundred twenty-two".