22113251 has 4 divisors (see below), whose sum is σ = 22123992. Its totient is φ = 22102512.

The previous prime is 22113241. The next prime is 22113253. The reversal of 22113251 is 15231122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22113251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22113253) 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, 1205 + ... + 6758.

It is an arithmetic number, because the mean of its divisors is an integer number (5530998).

Almost surely, 2^22113251 is an apocalyptic number.

22113251 is a deficient number, since it is larger than the sum of its proper divisors (10741).

22113251 is an equidigital number, since it uses as much as digits as its factorization.

22113251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740.

The product of its digits is 120, while the sum is 17.

The square root of 22113251 is about 4702.4728601024. The cubic root of 22113251 is about 280.6839191072.

Adding to 22113251 its reverse (15231122), we get a palindrome (37344373).

The spelling of 22113251 in words is "twenty-two million, one hundred thirteen thousand, two hundred fifty-one".