22145066571 has 4 divisors (see below), whose sum is σ = 29526755432. Its totient is φ = 14763377712.

The previous prime is 22145066569. The next prime is 22145066591. The reversal of 22145066571 is 17566054122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22145066571 - 2¹ = 22145066569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22145066551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690844426 + ... + 3690844431.

It is an arithmetic number, because the mean of its divisors is an integer number (7381688858).

Almost surely, 2^22145066571 is an apocalyptic number.

22145066571 is a deficient number, since it is larger than the sum of its proper divisors (7381688861).

22145066571 is an equidigital number, since it uses as much as digits as its factorization.

22145066571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381688860.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 22145066571 in words is "twenty-two billion, one hundred forty-five million, sixty-six thousand, five hundred seventy-one".