22145111135551 has 16 divisors (see below), whose sum is σ = 24331008902400. Its totient is φ = 20061764382528.

The previous prime is 22145111135527. The next prime is 22145111135569. The reversal of 22145111135551 is 15553111154122.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22145111135551 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 22145111135551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22145111130551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5593366 + ... + 8693443.

It is an arithmetic number, because the mean of its divisors is an integer number (1520688056400).

Almost surely, 2^{22145111135551} is an apocalyptic number.

22145111135551 is a deficient number, since it is larger than the sum of its proper divisors (2185897766849).

22145111135551 is a wasteful number, since it uses less digits than its factorization.

22145111135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14290398.

The product of its digits is 30000, while the sum is 37.

Adding to 22145111135551 its reverse (15553111154122), we get a palindrome (37698222289673).

The spelling of 22145111135551 in words is "twenty-two trillion, one hundred forty-five billion, one hundred eleven million, one hundred thirty-five thousand, five hundred fifty-one".