22145020552 has 16 divisors (see below), whose sum is σ = 41523558300. Its totient is φ = 11072071680.

The previous prime is 22145020507. The next prime is 22145020577. The reversal of 22145020552 is 25502054122.

It can be written as a sum of positive squares in 2 ways, for example, as 18800248996 + 3344771556 = 137114^2 + 57834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22145020552.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280152 + ... + 350392.

Almost surely, 2^22145020552 is an apocalyptic number.

It is an amenable number.

22145020552 is a deficient number, since it is larger than the sum of its proper divisors (19378537748).

22145020552 is a wasteful number, since it uses less digits than its factorization.

22145020552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109656 (or 109652 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 22145020552 its reverse (25502054122), we get a palindrome (47647074674).

The spelling of 22145020552 in words is "twenty-two billion, one hundred forty-five million, twenty thousand, five hundred fifty-two".