231221330313 has 8 divisors (see below), whose sum is σ = 310648505376. Its totient is φ = 152970854400.

The previous prime is 231221330303. The next prime is 231221330317. The reversal of 231221330313 is 313033122132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231221330313 - 2⁴ = 231221330297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231221330317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294174328 + ... + 294175113.

It is an arithmetic number, because the mean of its divisors is an integer number (38831063172).

Almost surely, 2^231221330313 is an apocalyptic number.

It is an amenable number.

231221330313 is a deficient number, since it is larger than the sum of its proper divisors (79427175063).

231221330313 is a wasteful number, since it uses less digits than its factorization.

231221330313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588349575.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 231221330313 its reverse (313033122132), we get a palindrome (544254452445).

The spelling of 231221330313 in words is "two hundred thirty-one billion, two hundred twenty-one million, three hundred thirty thousand, three hundred thirteen".