2212167391 has 4 divisors (see below), whose sum is σ = 2528191312. Its totient is φ = 1896143472.

The previous prime is 2212167367. The next prime is 2212167403. The reversal of 2212167391 is 1937612122.

It is a happy number.

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 2212167391 - 2¹¹ = 2212165343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212167311) 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, 158011950 + ... + 158011963.

It is an arithmetic number, because the mean of its divisors is an integer number (632047828).

Almost surely, 2^2212167391 is an apocalyptic number.

2212167391 is a deficient number, since it is larger than the sum of its proper divisors (316023921).

2212167391 is an equidigital number, since it uses as much as digits as its factorization.

2212167391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316023920.

The product of its digits is 9072, while the sum is 34.

The square root of 2212167391 is about 47033.6835788991. The cubic root of 2212167391 is about 1302.9847377982.

It can be divided in two parts, 221 and 2167391, that added together give a palindrome (2167612).

The spelling of 2212167391 in words is "two billion, two hundred twelve million, one hundred sixty-seven thousand, three hundred ninety-one".