402212321 has 8 divisors (see below), whose sum is σ = 474499584. Its totient is φ = 333632160.

The previous prime is 402212303. The next prime is 402212329. The reversal of 402212321 is 123212204.

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 402212321 - 2¹⁸ = 401950177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402212321.

It is not an unprimeable number, because it can be changed into a prime (402212329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926540 + ... + 926973.

It is an arithmetic number, because the mean of its divisors is an integer number (59312448).

Almost surely, 2^402212321 is an apocalyptic number.

It is an amenable number.

402212321 is a deficient number, since it is larger than the sum of its proper divisors (72287263).

402212321 is a wasteful number, since it uses less digits than its factorization.

402212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853551.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 402212321 is about 20055.2317613136. The cubic root of 402212321 is about 738.1621797985.

Adding to 402212321 its reverse (123212204), we get a palindrome (525424525).

The spelling of 402212321 in words is "four hundred two million, two hundred twelve thousand, three hundred twenty-one".