231001013213 has 4 divisors (see below), whose sum is σ = 231002901660. Its totient is φ = 230999124768.

The previous prime is 231001013189. The next prime is 231001013219. The reversal of 231001013213 is 312310100132.

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 171444027364 + 59556985849 = 414058^2 + 244043^2 .

It is a cyclic number.

It is not a de Polignac number, because 231001013213 - 2¹⁶ = 231000947677 is a prime.

It is a super-3 number, since 3×231001013213³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231001013191 and 231001013200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231001013219) 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, 747008 + ... + 1009961.

It is an arithmetic number, because the mean of its divisors is an integer number (57750725415).

Almost surely, 2^231001013213 is an apocalyptic number.

It is an amenable number.

231001013213 is a deficient number, since it is larger than the sum of its proper divisors (1888447).

231001013213 is a wasteful number, since it uses less digits than its factorization.

231001013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888446.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 231001013213 its reverse (312310100132), we get a palindrome (543311113345).

The spelling of 231001013213 in words is "two hundred thirty-one billion, one million, thirteen thousand, two hundred thirteen".