231543097 has 2 divisors, whose sum is σ = 231543098. Its totient is φ = 231543096.

The previous prime is 231543071. The next prime is 231543119. The reversal of 231543097 is 790345132.

231543097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120472576 + 111070521 = 10976^2 + 10539^2 .

It is a cyclic number.

It is not a de Polignac number, because 231543097 - 2¹⁵ = 231510329 is a prime.

It is a super-2 number, since 2×231543097² = 107224411536702818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231543017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115771548 + 115771549.

It is an arithmetic number, because the mean of its divisors is an integer number (115771549).

Almost surely, 2^231543097 is an apocalyptic number.

It is an amenable number.

231543097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231543097 is an equidigital number, since it uses as much as digits as its factorization.

231543097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 231543097 is about 15216.5402440897. The cubic root of 231543097 is about 614.0597233831.

The spelling of 231543097 in words is "two hundred thirty-one million, five hundred forty-three thousand, ninety-seven".