402231423 has 32 divisors (see below), whose sum is σ = 595676160. Its totient is φ = 239391360.

The previous prime is 402231419. The next prime is 402231451. The reversal of 402231423 is 324132204.

It is not a de Polignac number, because 402231423 - 2² = 402231419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402231423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402231623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721861 + ... + 722417.

It is an arithmetic number, because the mean of its divisors is an integer number (18614880).

Almost surely, 2^402231423 is an apocalyptic number.

402231423 is a deficient number, since it is larger than the sum of its proper divisors (193444737).

402231423 is a wasteful number, since it uses less digits than its factorization.

402231423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402231423 is about 20055.7079904949. The cubic root of 402231423 is about 738.1738652939.

Adding to 402231423 its reverse (324132204), we get a palindrome (726363627).

The spelling of 402231423 in words is "four hundred two million, two hundred thirty-one thousand, four hundred twenty-three".