400231423 has 4 divisors (see below), whose sum is σ = 403773408. Its totient is φ = 396689440.

The previous prime is 400231417. The next prime is 400231427. The reversal of 400231423 is 324132004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400231423 is a prime.

It is a super-3 number, since 3×400231423³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400231423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400231427) 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, 1770823 + ... + 1771048.

It is an arithmetic number, because the mean of its divisors is an integer number (100943352).

Almost surely, 2^400231423 is an apocalyptic number.

400231423 is a deficient number, since it is larger than the sum of its proper divisors (3541985).

400231423 is a wasteful number, since it uses less digits than its factorization.

400231423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541984.

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

The square root of 400231423 is about 20005.7847384200. The cubic root of 400231423 is about 736.9483672704.

Adding to 400231423 its reverse (324132004), we get a palindrome (724363427).

The spelling of 400231423 in words is "four hundred million, two hundred thirty-one thousand, four hundred twenty-three".