231102213 has 4 divisors (see below), whose sum is σ = 308136288. Its totient is φ = 154068140.

The previous prime is 231102211. The next prime is 231102217. The reversal of 231102213 is 312201132.

231102213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231102213 - 2¹ = 231102211 is a prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 231102192 and 231102201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231102211) 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, 38517033 + ... + 38517038.

It is an arithmetic number, because the mean of its divisors is an integer number (77034072).

Almost surely, 2^231102213 is an apocalyptic number.

It is an amenable number.

231102213 is a deficient number, since it is larger than the sum of its proper divisors (77034075).

231102213 is an equidigital number, since it uses as much as digits as its factorization.

231102213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77034074.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231102213 is about 15202.0463425159. The cubic root of 231102213 is about 613.6697295757.

Adding to 231102213 its reverse (312201132), we get a palindrome (543303345).

The spelling of 231102213 in words is "two hundred thirty-one million, one hundred two thousand, two hundred thirteen".