211842093 has 4 divisors (see below), whose sum is σ = 282456128. Its totient is φ = 141228060.

The previous prime is 211842089. The next prime is 211842119. The reversal of 211842093 is 390248112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211842093 - 2² = 211842089 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 211842093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211842023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35307013 + ... + 35307018.

It is an arithmetic number, because the mean of its divisors is an integer number (70614032).

Almost surely, 2^211842093 is an apocalyptic number.

It is an amenable number.

211842093 is a deficient number, since it is larger than the sum of its proper divisors (70614035).

211842093 is an equidigital number, since it uses as much as digits as its factorization.

211842093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70614034.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 211842093 is about 14554.7962198033. The cubic root of 211842093 is about 596.1251154311.

The spelling of 211842093 in words is "two hundred eleven million, eight hundred forty-two thousand, ninety-three".