22145025505 has 16 divisors (see below), whose sum is σ = 27017069904. Its totient is φ = 17420820480.

The previous prime is 22145025421. The next prime is 22145025547. The reversal of 22145025505 is 50552054122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7502331456 + 14642694049 = 86616^2 + 121007^2 .

It is not a de Polignac number, because 22145025505 - 2¹¹ = 22145023457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461649 + ... + 1476721.

It is an arithmetic number, because the mean of its divisors is an integer number (1688566869).

Almost surely, 2^22145025505 is an apocalyptic number.

It is an amenable number.

22145025505 is a deficient number, since it is larger than the sum of its proper divisors (4872044399).

22145025505 is a wasteful number, since it uses less digits than its factorization.

22145025505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956.

The product of its (nonzero) digits is 20000, while the sum is 31.

Adding to 22145025505 its reverse (50552054122), we get a palindrome (72697079627).

The spelling of 22145025505 in words is "twenty-two billion, one hundred forty-five million, twenty-five thousand, five hundred five".