231501097 has 2 divisors, whose sum is σ = 231501098. Its totient is φ = 231501096.

The previous prime is 231501091. The next prime is 231501107. The reversal of 231501097 is 790105132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128051856 + 103449241 = 11316^2 + 10171^2 .

It is a cyclic number.

It is not a de Polignac number, because 231501097 - 2¹¹ = 231499049 is a prime.

It is not a weakly prime, because it can be changed into another prime (231501091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115750548 + 115750549.

It is an arithmetic number, because the mean of its divisors is an integer number (115750549).

Almost surely, 2^231501097 is an apocalyptic number.

It is an amenable number.

231501097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231501097 is an equidigital number, since it uses as much as digits as its factorization.

231501097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 231501097 is about 15215.1601043170. The cubic root of 231501097 is about 614.0225926887.

The spelling of 231501097 in words is "two hundred thirty-one million, five hundred one thousand, ninety-seven".