22162251 has 4 divisors (see below), whose sum is σ = 29549672. Its totient is φ = 14774832.

The previous prime is 22162249. The next prime is 22162253. The reversal of 22162251 is 15226122.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (22162249) and next prime (22162253).

It is not a de Polignac number, because 22162251 - 2¹ = 22162249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22162253) 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, 3693706 + ... + 3693711.

It is an arithmetic number, because the mean of its divisors is an integer number (7387418).

Almost surely, 2^22162251 is an apocalyptic number.

22162251 is a deficient number, since it is larger than the sum of its proper divisors (7387421).

22162251 is an equidigital number, since it uses as much as digits as its factorization.

22162251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387420.

The product of its digits is 480, while the sum is 21.

The square root of 22162251 is about 4707.6800018693. The cubic root of 22162251 is about 280.8910854781.

Adding to 22162251 its reverse (15226122), we get a palindrome (37388373).

The spelling of 22162251 in words is "twenty-two million, one hundred sixty-two thousand, two hundred fifty-one".