231205402 has 8 divisors (see below), whose sum is σ = 348336576. Its totient is φ = 115093212.

The previous prime is 231205399. The next prime is 231205411. The reversal of 231205402 is 204502132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231205402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254178 + ... + 255085.

It is an arithmetic number, because the mean of its divisors is an integer number (43542072).

Almost surely, 2^231205402 is an apocalyptic number.

231205402 is a deficient number, since it is larger than the sum of its proper divisors (117131174).

231205402 is a wasteful number, since it uses less digits than its factorization.

231205402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509492.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 231205402 is about 15205.4398818318. The cubic root of 231205402 is about 613.7610521444.

Adding to 231205402 its reverse (204502132), we get a palindrome (435707534).

The spelling of 231205402 in words is "two hundred thirty-one million, two hundred five thousand, four hundred two".