231553097 has 2 divisors, whose sum is σ = 231553098. Its totient is φ = 231553096.

The previous prime is 231553079. The next prime is 231553099. The reversal of 231553097 is 790355132.

It is a happy number.

231553097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (231553079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121638841 + 109914256 = 11029^2 + 10484^2 .

It is a cyclic number.

It is not a de Polignac number, because 231553097 - 2¹⁶ = 231487561 is a prime.

Together with 231553099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231553099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115776548 + 115776549.

It is an arithmetic number, because the mean of its divisors is an integer number (115776549).

Almost surely, 2^231553097 is an apocalyptic number.

It is an amenable number.

231553097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231553097 is an equidigital number, since it uses as much as digits as its factorization.

231553097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 231553097 is about 15216.8688303475. The cubic root of 231553097 is about 614.0685633628.

The spelling of 231553097 in words is "two hundred thirty-one million, five hundred fifty-three thousand, ninety-seven".