231003133261 has 2 divisors, whose sum is σ = 231003133262. Its totient is φ = 231003133260.

The previous prime is 231003133241. The next prime is 231003133337. The reversal of 231003133261 is 162331300132.

231003133261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154830445225 + 76172688036 = 393485^2 + 275994^2 .

It is a cyclic number.

It is not a de Polignac number, because 231003133261 - 2⁹ = 231003132749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231003133241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115501566630 + 115501566631.

It is an arithmetic number, because the mean of its divisors is an integer number (115501566631).

Almost surely, 2^231003133261 is an apocalyptic number.

It is an amenable number.

231003133261 is a deficient number, since it is larger than the sum of its proper divisors (1).

231003133261 is an equidigital number, since it uses as much as digits as its factorization.

231003133261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 231003133261 its reverse (162331300132), we get a palindrome (393334433393).

The spelling of 231003133261 in words is "two hundred thirty-one billion, three million, one hundred thirty-three thousand, two hundred sixty-one".