231945223567 has 2 divisors, whose sum is σ = 231945223568. Its totient is φ = 231945223566.

The previous prime is 231945223519. The next prime is 231945223613. The reversal of 231945223567 is 765322549132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231945223567 - 2¹⁹ = 231944699279 is a prime.

It is a super-2 number, since 2×231945223567² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231945223567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231945223507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115972611783 + 115972611784.

It is an arithmetic number, because the mean of its divisors is an integer number (115972611784).

Almost surely, 2^231945223567 is an apocalyptic number.

231945223567 is a deficient number, since it is larger than the sum of its proper divisors (1).

231945223567 is an equidigital number, since it uses as much as digits as its factorization.

231945223567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 49.

The spelling of 231945223567 in words is "two hundred thirty-one billion, nine hundred forty-five million, two hundred twenty-three thousand, five hundred sixty-seven".