211322091 has 16 divisors (see below), whose sum is σ = 296626176. Its totient is φ = 133558656.

The previous prime is 211322063. The next prime is 211322141. The reversal of 211322091 is 190223112.

It is not a de Polignac number, because 211322091 - 2¹³ = 211313899 is a prime.

It is a super-2 number, since 2×211322091² = 89314052289224562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211322021) 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 15 ways as a sum of consecutive naturals, for example, 5755 + ... + 21348.

It is an arithmetic number, because the mean of its divisors is an integer number (18539136).

Almost surely, 2^211322091 is an apocalyptic number.

211322091 is a deficient number, since it is larger than the sum of its proper divisors (85304085).

211322091 is a wasteful number, since it uses less digits than its factorization.

211322091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27242.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 211322091 is about 14536.9216479969. The cubic root of 211322091 is about 595.6369527119.

The spelling of 211322091 in words is "two hundred eleven million, three hundred twenty-two thousand, ninety-one".