22154540717 has 4 divisors (see below), whose sum is σ = 22282601820. Its totient is φ = 22026479616.

The previous prime is 22154540663. The next prime is 22154540741. The reversal of 22154540717 is 71704545122.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19890589156 + 2263951561 = 141034^2 + 47581^2 .

It is a cyclic number.

It is not a de Polignac number, because 22154540717 - 2¹⁶ = 22154475181 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 (22154542717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64030292 + ... + 64030637.

It is an arithmetic number, because the mean of its divisors is an integer number (5570650455).

Almost surely, 2^22154540717 is an apocalyptic number.

It is an amenable number.

22154540717 is a deficient number, since it is larger than the sum of its proper divisors (128061103).

22154540717 is a wasteful number, since it uses less digits than its factorization.

22154540717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128061102.

The product of its (nonzero) digits is 78400, while the sum is 38.

It can be divided in two parts, 221545 and 40717, that added together give a palindrome (262262).

The spelling of 22154540717 in words is "twenty-two billion, one hundred fifty-four million, five hundred forty thousand, seven hundred seventeen".