22136513 has 4 divisors (see below), whose sum is σ = 25298880. Its totient is φ = 18974148.

The previous prime is 22136509. The next prime is 22136531. The reversal of 22136513 is 31563122.

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: 31563122 = 2 ⋅15781561.

It is a cyclic number.

It is not a de Polignac number, because 22136513 - 2² = 22136509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22136503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1581173 + ... + 1581186.

It is an arithmetic number, because the mean of its divisors is an integer number (6324720).

Almost surely, 2^22136513 is an apocalyptic number.

It is an amenable number.

22136513 is a deficient number, since it is larger than the sum of its proper divisors (3162367).

22136513 is an equidigital number, since it uses as much as digits as its factorization.

22136513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162366.

The product of its digits is 1080, while the sum is 23.

The square root of 22136513 is about 4704.9455894835. The cubic root of 22136513 is about 280.7823062866.

Adding to 22136513 its reverse (31563122), we get a palindrome (53699635).

The spelling of 22136513 in words is "twenty-two million, one hundred thirty-six thousand, five hundred thirteen".