22115501 has 4 divisors (see below), whose sum is σ = 22490400. Its totient is φ = 21740604.

The previous prime is 22115473. The next prime is 22115507. The reversal of 22115501 is 10551122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10551122 = 2 ⋅5275561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22115501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22115501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187361 + ... + 187478.

It is an arithmetic number, because the mean of its divisors is an integer number (5622600).

Almost surely, 2^22115501 is an apocalyptic number.

It is an amenable number.

22115501 is a deficient number, since it is larger than the sum of its proper divisors (374899).

22115501 is an equidigital number, since it uses as much as digits as its factorization.

22115501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374898.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 22115501 is about 4702.7120898477. The cubic root of 22115501 is about 280.6934385487.

Adding to 22115501 its reverse (10551122), we get a palindrome (32666623).

The spelling of 22115501 in words is "twenty-two million, one hundred fifteen thousand, five hundred one".