231343745 has 4 divisors (see below), whose sum is σ = 277612500. Its totient is φ = 185074992.

The previous prime is 231343709. The next prime is 231343751. The reversal of 231343745 is 547343132.

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 30724849 + 200618896 = 5543^2 + 14164^2 .

It is a cyclic number.

It is not a de Polignac number, because 231343745 - 2¹⁸ = 231081601 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 23134370 + ... + 23134379.

It is an arithmetic number, because the mean of its divisors is an integer number (69403125).

Almost surely, 2^231343745 is an apocalyptic number.

It is an amenable number.

231343745 is a deficient number, since it is larger than the sum of its proper divisors (46268755).

231343745 is an equidigital number, since it uses as much as digits as its factorization.

231343745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46268754.

The product of its digits is 30240, while the sum is 32.

The square root of 231343745 is about 15209.9883300415. The cubic root of 231343745 is about 613.8834434824.

Adding to 231343745 its reverse (547343132), we get a palindrome (778686877).

The spelling of 231343745 in words is "two hundred thirty-one million, three hundred forty-three thousand, seven hundred forty-five".