231986353 has 4 divisors (see below), whose sum is σ = 236363508. Its totient is φ = 227609200.

The previous prime is 231986329. The next prime is 231986357. The reversal of 231986353 is 353689132.

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 195105024 + 36881329 = 13968^2 + 6073^2 .

It is a cyclic number.

It is not a de Polignac number, because 231986353 - 2⁹ = 231985841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231986357) 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, 2188498 + ... + 2188603.

It is an arithmetic number, because the mean of its divisors is an integer number (59090877).

Almost surely, 2^231986353 is an apocalyptic number.

It is an amenable number.

231986353 is a deficient number, since it is larger than the sum of its proper divisors (4377155).

231986353 is an equidigital number, since it uses as much as digits as its factorization.

231986353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377154.

The product of its digits is 116640, while the sum is 40.

The square root of 231986353 is about 15231.0982204173. The cubic root of 231986353 is about 614.4513166516.

The spelling of 231986353 in words is "two hundred thirty-one million, nine hundred eighty-six thousand, three hundred fifty-three".