402233221 has 8 divisors (see below), whose sum is σ = 435375864. Its totient is φ = 369405120.

The previous prime is 402233213. The next prime is 402233261. The reversal of 402233221 is 122332204.

It can be written as a sum of positive squares in 4 ways, for example, as 155900196 + 246333025 = 12486^2 + 15695^2 .

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 402233221 - 2³ = 402233213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402233201) 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, 75970 + ... + 81091.

It is an arithmetic number, because the mean of its divisors is an integer number (54421983).

Almost surely, 2^402233221 is an apocalyptic number.

It is an amenable number.

402233221 is a deficient number, since it is larger than the sum of its proper divisors (33142643).

402233221 is a wasteful number, since it uses less digits than its factorization.

402233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157271.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402233221 is about 20055.7528155888. The cubic root of 402233221 is about 738.1749651870.

Adding to 402233221 its reverse (122332204), we get a palindrome (524565425).

The spelling of 402233221 in words is "four hundred two million, two hundred thirty-three thousand, two hundred twenty-one".