213012231 has 8 divisors (see below), whose sum is σ = 284388720. Its totient is φ = 141821952.

The previous prime is 213012209. The next prime is 213012259. The reversal of 213012231 is 132210312.

213012231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 213012231 - 2⁶ = 213012167 is a prime.

It is a super-2 number, since 2×213012231² = 90748421111194722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213012231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213012281) 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, 43860 + ... + 48473.

It is an arithmetic number, because the mean of its divisors is an integer number (35548590).

Almost surely, 2^213012231 is an apocalyptic number.

213012231 is a deficient number, since it is larger than the sum of its proper divisors (71376489).

213012231 is an equidigital number, since it uses as much as digits as its factorization.

213012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93105.

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

The square root of 213012231 is about 14594.9385404667. The cubic root of 213012231 is about 597.2206928538.

Adding to 213012231 its reverse (132210312), we get a palindrome (345222543).

It can be divided in two parts, 21301 and 2231, that added together give a palindrome (23532).

The spelling of 213012231 in words is "two hundred thirteen million, twelve thousand, two hundred thirty-one".