213113231 has 2 divisors, whose sum is σ = 213113232. Its totient is φ = 213113230.

The previous prime is 213113179. The next prime is 213113269. The reversal of 213113231 is 132311312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213113231 - 2¹⁴ = 213096847 is a prime.

It is a super-2 number, since 2×213113231² = 90834498454518722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213113731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106556615 + 106556616.

It is an arithmetic number, because the mean of its divisors is an integer number (106556616).

Almost surely, 2^213113231 is an apocalyptic number.

213113231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213113231 is an equidigital number, since it uses as much as digits as its factorization.

213113231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213113231 is about 14598.3982340529. The cubic root of 213113231 is about 597.3150689040.

Adding to 213113231 its reverse (132311312), we get a palindrome (345424543).

It can be divided in two parts, 21311 and 3231, that added together give a palindrome (24542).

The spelling of 213113231 in words is "two hundred thirteen million, one hundred thirteen thousand, two hundred thirty-one".