231002130331 has 4 divisors (see below), whose sum is σ = 264002434672. Its totient is φ = 198001825992.

The previous prime is 231002130299. The next prime is 231002130343. The reversal of 231002130331 is 133031200132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231002130331 - 2⁵ = 231002130299 is a prime.

It is a super-2 number, since 2×231002130331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231002130299 and 231002130308.

It is not an unprimeable number, because it can be changed into a prime (231002130391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16500152160 + ... + 16500152173.

It is an arithmetic number, because the mean of its divisors is an integer number (66000608668).

Almost surely, 2^231002130331 is an apocalyptic number.

231002130331 is a deficient number, since it is larger than the sum of its proper divisors (33000304341).

231002130331 is an equidigital number, since it uses as much as digits as its factorization.

231002130331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33000304340.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 231002130331 its reverse (133031200132), we get a palindrome (364033330463).

The spelling of 231002130331 in words is "two hundred thirty-one billion, two million, one hundred thirty thousand, three hundred thirty-one".