213271091 has 6 divisors (see below), whose sum is σ = 234422076. Its totient is φ = 193882700.

The previous prime is 213271057. The next prime is 213271109. The reversal of 213271091 is 190172312.

It is not a de Polignac number, because 213271091 - 2¹⁴ = 213254707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213271091.

It is not an unprimeable number, because it can be changed into a prime (213271021) 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 5 ways as a sum of consecutive naturals, for example, 881165 + ... + 881406.

It is an arithmetic number, because the mean of its divisors is an integer number (39070346).

Almost surely, 2^213271091 is an apocalyptic number.

213271091 is a deficient number, since it is larger than the sum of its proper divisors (21150985).

213271091 is a wasteful number, since it uses less digits than its factorization.

213271091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762593 (or 1762582 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 213271091 is about 14603.8039907416. The cubic root of 213271091 is about 597.4625161619.

The spelling of 213271091 in words is "two hundred thirteen million, two hundred seventy-one thousand, ninety-one".