402203231 has 4 divisors (see below), whose sum is σ = 419690352. Its totient is φ = 384716112.

The previous prime is 402203227. The next prime is 402203239. The reversal of 402203231 is 132302204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402203231 - 2² = 402203227 is a prime.

It is a super-2 number, since 2×402203231² = 323534878053678722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402203239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8743526 + ... + 8743571.

It is an arithmetic number, because the mean of its divisors is an integer number (104922588).

Almost surely, 2^402203231 is an apocalyptic number.

402203231 is a deficient number, since it is larger than the sum of its proper divisors (17487121).

402203231 is a wasteful number, since it uses less digits than its factorization.

402203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17487120.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 402203231 is about 20055.0051358757. The cubic root of 402203231 is about 738.1566189339.

Adding to 402203231 its reverse (132302204), we get a palindrome (534505435).

The spelling of 402203231 in words is "four hundred two million, two hundred three thousand, two hundred thirty-one".