402322231 has 2 divisors, whose sum is σ = 402322232. Its totient is φ = 402322230.

The previous prime is 402322229. The next prime is 402322237. The reversal of 402322231 is 132223204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402322231 - 2¹ = 402322229 is a prime.

It is a super-2 number, since 2×402322231² = 323726355113634722, which contains 22 as substring.

Together with 402322229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 402322199 and 402322208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402322237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201161115 + 201161116.

It is an arithmetic number, because the mean of its divisors is an integer number (201161116).

Almost surely, 2^402322231 is an apocalyptic number.

402322231 is a deficient number, since it is larger than the sum of its proper divisors (1).

402322231 is an equidigital number, since it uses as much as digits as its factorization.

402322231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 402322231 is about 20057.9717568851. The cubic root of 402322231 is about 738.2294113012.

Adding to 402322231 its reverse (132223204), we get a palindrome (534545435).

The spelling of 402322231 in words is "four hundred two million, three hundred twenty-two thousand, two hundred thirty-one".