402321213 has 36 divisors (see below), whose sum is σ = 679206528. Its totient is φ = 228810960.

The previous prime is 402321211. The next prime is 402321217. The reversal of 402321213 is 312123204.

It is not a de Polignac number, because 402321213 - 2¹ = 402321211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402321211) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96298 + ... + 100388.

It is an arithmetic number, because the mean of its divisors is an integer number (18866848).

Almost surely, 2^402321213 is an apocalyptic number.

It is an amenable number.

402321213 is a deficient number, since it is larger than the sum of its proper divisors (276885315).

402321213 is a wasteful number, since it uses less digits than its factorization.

402321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4334 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 402321213 is about 20057.9463804249. The cubic root of 402321213 is about 738.2287886509.

Adding to 402321213 its reverse (312123204), we get a palindrome (714444417).

The spelling of 402321213 in words is "four hundred two million, three hundred twenty-one thousand, two hundred thirteen".