231897245 has 4 divisors (see below), whose sum is σ = 278276700. Its totient is φ = 185517792.

The previous prime is 231897233. The next prime is 231897277. The reversal of 231897245 is 542798132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 138909796 + 92987449 = 11786^2 + 9643^2 .

It is a cyclic number.

It is not a de Polignac number, because 231897245 - 2⁸ = 231896989 is a prime.

It is a Curzon number.

It is a congruent number.

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, 23189720 + ... + 23189729.

It is an arithmetic number, because the mean of its divisors is an integer number (69569175).

Almost surely, 2^231897245 is an apocalyptic number.

It is an amenable number.

231897245 is a deficient number, since it is larger than the sum of its proper divisors (46379455).

231897245 is an equidigital number, since it uses as much as digits as its factorization.

231897245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46379454.

The product of its digits is 120960, while the sum is 41.

The square root of 231897245 is about 15228.1727400237. The cubic root of 231897245 is about 614.3726345236.

The spelling of 231897245 in words is "two hundred thirty-one million, eight hundred ninety-seven thousand, two hundred forty-five".