231153612997 has 4 divisors (see below), whose sum is σ = 231172876576. Its totient is φ = 231134349420.

The previous prime is 231153612971. The next prime is 231153613037. The reversal of 231153612997 is 799216351132.

It is a happy number.

231153612997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231153612997 - 2⁷ = 231153612869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231153612997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231153612917) 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 in 3 ways as a sum of consecutive naturals, for example, 9613779 + ... + 9637792.

It is an arithmetic number, because the mean of its divisors is an integer number (57793219144).

Almost surely, 2^231153612997 is an apocalyptic number.

It is an amenable number.

231153612997 is a deficient number, since it is larger than the sum of its proper divisors (19263579).

231153612997 is a wasteful number, since it uses less digits than its factorization.

231153612997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19263578.

The product of its digits is 612360, while the sum is 49.

The spelling of 231153612997 in words is "two hundred thirty-one billion, one hundred fifty-three million, six hundred twelve thousand, nine hundred ninety-seven".