231402423 has 16 divisors (see below), whose sum is σ = 356864256. Its totient is φ = 130635840.

The previous prime is 231402377. The next prime is 231402427. The reversal of 231402423 is 324204132.

It is not a de Polignac number, because 231402423 - 2¹² = 231398327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 231402423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231402427) 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 15 ways as a sum of consecutive naturals, for example, 64638 + ... + 68123.

It is an arithmetic number, because the mean of its divisors is an integer number (22304016).

Almost surely, 2^231402423 is an apocalyptic number.

231402423 is a deficient number, since it is larger than the sum of its proper divisors (125461833).

231402423 is a wasteful number, since it uses less digits than its factorization.

231402423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132854.

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

The square root of 231402423 is about 15211.9171375603. The cubic root of 231402423 is about 613.9353408694.

Adding to 231402423 its reverse (324204132), we get a palindrome (555606555).

The spelling of 231402423 in words is "two hundred thirty-one million, four hundred two thousand, four hundred twenty-three".