213132091 has 2 divisors, whose sum is σ = 213132092. Its totient is φ = 213132090.

The previous prime is 213132089. The next prime is 213132137. The reversal of 213132091 is 190231312.

213132091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213132091 - 2¹ = 213132089 is a prime.

Together with 213132089, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213132001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106566045 + 106566046.

It is an arithmetic number, because the mean of its divisors is an integer number (106566046).

Almost surely, 2^213132091 is an apocalyptic number.

213132091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213132091 is an equidigital number, since it uses as much as digits as its factorization.

213132091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 213132091 is about 14599.0441810414. The cubic root of 213132091 is about 597.3326886921.

The spelling of 213132091 in words is "two hundred thirteen million, one hundred thirty-two thousand, ninety-one".