231020767 has 2 divisors, whose sum is σ = 231020768. Its totient is φ = 231020766.

The previous prime is 231020749. The next prime is 231020819. The reversal of 231020767 is 767020132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231020767 - 2¹¹ = 231018719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231020707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510383 + 115510384.

It is an arithmetic number, because the mean of its divisors is an integer number (115510384).

Almost surely, 2^231020767 is an apocalyptic number.

231020767 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020767 is an equidigital number, since it uses as much as digits as its factorization.

231020767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 231020767 is about 15199.3673223592. The cubic root of 231020767 is about 613.5976304284.

Adding to 231020767 its reverse (767020132), we get a palindrome (998040899).

The spelling of 231020767 in words is "two hundred thirty-one million, twenty thousand, seven hundred sixty-seven".