213230091 has 8 divisors (see below), whose sum is σ = 284571280. Its totient is φ = 142021152.

The previous prime is 213230081. The next prime is 213230093. The reversal of 213230091 is 190032312.

It is a happy number.

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

It is not a de Polignac number, because 213230091 - 2¹⁸ = 212967947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213230093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29236 + ... + 35793.

It is an arithmetic number, because the mean of its divisors is an integer number (35571410).

Almost surely, 2^213230091 is an apocalyptic number.

213230091 is a deficient number, since it is larger than the sum of its proper divisors (71341189).

213230091 is a wasteful number, since it uses less digits than its factorization.

213230091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66125.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 213230091 is about 14602.4001794226. The cubic root of 213230091 is about 597.4242275953.

It can be divided in two parts, 2132 and 30091, that added together give a palindrome (32223).

The spelling of 213230091 in words is "two hundred thirteen million, two hundred thirty thousand, ninety-one".