231342405 has 32 divisors (see below), whose sum is σ = 424721664. Its totient is φ = 105332736.

The previous prime is 231342383. The next prime is 231342431. The reversal of 231342405 is 504243132.

It is not a de Polignac number, because 231342405 - 2⁵ = 231342373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22699 + ... + 31271.

It is an arithmetic number, because the mean of its divisors is an integer number (13272552).

Almost surely, 2^231342405 is an apocalyptic number.

It is an amenable number.

231342405 is a deficient number, since it is larger than the sum of its proper divisors (193379259).

231342405 is a wasteful number, since it uses less digits than its factorization.

231342405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8845.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 231342405 is about 15209.9442799768. The cubic root of 231342405 is about 613.8822582253.

Adding to 231342405 its reverse (504243132), we get a palindrome (735585537).

The spelling of 231342405 in words is "two hundred thirty-one million, three hundred forty-two thousand, four hundred five".