213030091 has 2 divisors, whose sum is σ = 213030092. Its totient is φ = 213030090.

The previous prime is 213030073. The next prime is 213030107. The reversal of 213030091 is 190030312.

213030091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213030091 - 2⁷ = 213029963 is a prime.

It is not a weakly prime, because it can be changed into another prime (213030011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515045 + 106515046.

It is an arithmetic number, because the mean of its divisors is an integer number (106515046).

Almost surely, 2^213030091 is an apocalyptic number.

213030091 is a deficient number, since it is larger than the sum of its proper divisors (1).

213030091 is an equidigital number, since it uses as much as digits as its factorization.

213030091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 213030091 is about 14595.5503835929. The cubic root of 213030091 is about 597.2373837005.

The spelling of 213030091 in words is "two hundred thirteen million, thirty thousand, ninety-one".