212203091 has 4 divisors (see below), whose sum is σ = 219048384. Its totient is φ = 205357800.

The previous prime is 212203087. The next prime is 212203093. The reversal of 212203091 is 190302212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212203091 - 2² = 212203087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212203093) 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, 3422600 + ... + 3422661.

It is an arithmetic number, because the mean of its divisors is an integer number (54762096).

Almost surely, 2^212203091 is an apocalyptic number.

212203091 is a deficient number, since it is larger than the sum of its proper divisors (6845293).

212203091 is an equidigital number, since it uses as much as digits as its factorization.

212203091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845292.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 212203091 is about 14567.1922826604. The cubic root of 212203091 is about 596.4635402250.

The spelling of 212203091 in words is "two hundred twelve million, two hundred three thousand, ninety-one".