231000322013 has 4 divisors (see below), whose sum is σ = 232276567068. Its totient is φ = 229724076960.

The previous prime is 231000321997. The next prime is 231000322037. The reversal of 231000322013 is 310223000132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3186941209 + 227813380804 = 56453^2 + 477298^2 .

It is a cyclic number.

It is not a de Polignac number, because 231000322013 - 2⁴ = 231000321997 is a prime.

It is a super-2 number, since 2×231000322013² (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 = 231000321982 and 231000322000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231000322313) 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, 638122256 + ... + 638122617.

It is an arithmetic number, because the mean of its divisors is an integer number (58069141767).

Almost surely, 2^231000322013 is an apocalyptic number.

It is an amenable number.

231000322013 is a deficient number, since it is larger than the sum of its proper divisors (1276245055).

231000322013 is a wasteful number, since it uses less digits than its factorization.

231000322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276245054.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231000322013 its reverse (310223000132), we get a palindrome (541223322145).

The spelling of 231000322013 in words is "two hundred thirty-one billion, three hundred twenty-two thousand, thirteen".