231133009 has 2 divisors, whose sum is σ = 231133010. Its totient is φ = 231133008.

The previous prime is 231132977. The next prime is 231133039. The reversal of 231133009 is 900331132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121616784 + 109516225 = 11028^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 231133009 - 2⁵ = 231132977 is a prime.

It is equal to p_12701515 and since 231133009 and 12701515 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231133039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115566504 + 115566505.

It is an arithmetic number, because the mean of its divisors is an integer number (115566505).

Almost surely, 2^231133009 is an apocalyptic number.

It is an amenable number.

231133009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231133009 is an equidigital number, since it uses as much as digits as its factorization.

231133009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 231133009 is about 15203.0591987271. The cubic root of 231133009 is about 613.6969869717.

The spelling of 231133009 in words is "two hundred thirty-one million, one hundred thirty-three thousand, nine".