402403231 has 4 divisors (see below), whose sum is σ = 413279032. Its totient is φ = 391527432.

The previous prime is 402403171. The next prime is 402403241. The reversal of 402403231 is 132304204.

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 402403231 - 2⁷ = 402403103 is a prime.

It is a super-2 number, since 2×402403231² = 323856720638478722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402403199 and 402403208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402403241) 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, 5437845 + ... + 5437918.

It is an arithmetic number, because the mean of its divisors is an integer number (103319758).

Almost surely, 2^402403231 is an apocalyptic number.

402403231 is a deficient number, since it is larger than the sum of its proper divisors (10875801).

402403231 is a wasteful number, since it uses less digits than its factorization.

402403231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10875800.

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

The square root of 402403231 is about 20059.9908025901. The cubic root of 402403231 is about 738.2789508370.

Adding to 402403231 its reverse (132304204), we get a palindrome (534707435).

The spelling of 402403231 in words is "four hundred two million, four hundred three thousand, two hundred thirty-one".