22145201555 has 24 divisors (see below), whose sum is σ = 28479412512. Its totient is φ = 16526354432.

The previous prime is 22145201539. The next prime is 22145201579. The reversal of 22145201555 is 55510254122.

It is a happy number.

It is not a de Polignac number, because 22145201555 - 2⁴ = 22145201539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95474 + ... + 231096.

It is an arithmetic number, because the mean of its divisors is an integer number (1186642188).

Almost surely, 2^22145201555 is an apocalyptic number.

22145201555 is a deficient number, since it is larger than the sum of its proper divisors (6334210957).

22145201555 is a wasteful number, since it uses less digits than its factorization.

22145201555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135775 (or 135758 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 22145201555 its reverse (55510254122), we get a palindrome (77655455677).

The spelling of 22145201555 in words is "twenty-two billion, one hundred forty-five million, two hundred one thousand, five hundred fifty-five".