22451212524545 has 24 divisors (see below), whose sum is σ = 31340268480744. Its totient is φ = 15395014715136.

The previous prime is 22451212524529. The next prime is 22451212524547. The reversal of 22451212524545 is 54542521215422.

It can be written as a sum of positive squares in 4 ways, for example, as 4355368650304 + 18095843874241 = 2086952^2 + 4253921^2 .

It is not a de Polignac number, because 22451212524545 - 2⁴ = 22451212524529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22451212524496 and 22451212524505.

It is not an unprimeable number, because it can be changed into a prime (22451212524547) 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 23 ways as a sum of consecutive naturals, for example, 65616029 + ... + 65957301.

It is an arithmetic number, because the mean of its divisors is an integer number (1305844520031).

Almost surely, 2^{22451212524545} is an apocalyptic number.

It is an amenable number.

22451212524545 is a deficient number, since it is larger than the sum of its proper divisors (8889055956199).

22451212524545 is a wasteful number, since it uses less digits than its factorization.

22451212524545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609809 (or 609802 counting only the distinct ones).

The product of its digits is 1280000, while the sum is 44.

Adding to 22451212524545 its reverse (54542521215422), we get a palindrome (76993733739967).

The spelling of 22451212524545 in words is "twenty-two trillion, four hundred fifty-one billion, two hundred twelve million, five hundred twenty-four thousand, five hundred forty-five".