231310645321 has 16 divisors (see below), whose sum is σ = 277216905600. Its totient is φ = 188807165568.

The previous prime is 231310645283. The next prime is 231310645403. The reversal of 231310645321 is 123546013132.

It is not a de Polignac number, because 231310645321 - 2⁹ = 231310644809 is a prime.

It is a super-2 number, since 2×231310645321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231310645021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7789711 + ... + 7819348.

It is an arithmetic number, because the mean of its divisors is an integer number (17326056600).

Almost surely, 2^231310645321 is an apocalyptic number.

It is an amenable number.

231310645321 is a deficient number, since it is larger than the sum of its proper divisors (45906260279).

231310645321 is a wasteful number, since it uses less digits than its factorization.

231310645321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15609168.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 231310645321 its reverse (123546013132), we get a palindrome (354856658453).

The spelling of 231310645321 in words is "two hundred thirty-one billion, three hundred ten million, six hundred forty-five thousand, three hundred twenty-one".