231106331 has 2 divisors, whose sum is σ = 231106332. Its totient is φ = 231106330.

The previous prime is 231106327. The next prime is 231106373. The reversal of 231106331 is 133601132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231106331 - 2² = 231106327 is a prime.

It is a super-2 number, since 2×231106331² = 106820272456563122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231106531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115553165 + 115553166.

It is an arithmetic number, because the mean of its divisors is an integer number (115553166).

Almost surely, 2^231106331 is an apocalyptic number.

231106331 is a deficient number, since it is larger than the sum of its proper divisors (1).

231106331 is an equidigital number, since it uses as much as digits as its factorization.

231106331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 231106331 is about 15202.1817842045. The cubic root of 231106331 is about 613.6733745385.

Adding to 231106331 its reverse (133601132), we get a palindrome (364707463).

The spelling of 231106331 in words is "two hundred thirty-one million, one hundred six thousand, three hundred thirty-one".