402334221 has 16 divisors (see below), whose sum is σ = 541195200. Its totient is φ = 265858560.

The previous prime is 402334133. The next prime is 402334243. The reversal of 402334221 is 122433204.

It is not a de Polignac number, because 402334221 - 2¹⁵ = 402301453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402334321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190630 + ... + 192728.

It is an arithmetic number, because the mean of its divisors is an integer number (33824700).

Almost surely, 2^402334221 is an apocalyptic number.

It is an amenable number.

402334221 is a deficient number, since it is larger than the sum of its proper divisors (138860979).

402334221 is a wasteful number, since it uses less digits than its factorization.

402334221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402334221 is about 20058.2706383178. The cubic root of 402334221 is about 738.2367447949.

Adding to 402334221 its reverse (122433204), we get a palindrome (524767425).

The spelling of 402334221 in words is "four hundred two million, three hundred thirty-four thousand, two hundred twenty-one".