22275861001 has 3 divisors (see below), whose sum is σ = 22276010253. Its totient is φ = 22275711750.

The previous prime is 22275860993. The next prime is 22275861007. The reversal of 22275861001 is 10016857222.

It is a happy number.

The square root of 22275861001 is 149251.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 22275861001 - 2³ = 22275860993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22275861007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74626 + ... + 223876.

It is an arithmetic number, because the mean of its divisors is an integer number (7425336751).

Almost surely, 2^22275861001 is an apocalyptic number.

22275861001 is the 149251-st square number.

22275861001 is the 74626-th centered octagonal number.

It is an amenable number.

22275861001 is a deficient number, since it is larger than the sum of its proper divisors (149252).

22275861001 is an frugal number, since it uses more digits than its factorization.

22275861001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298502 (or 149251 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 22275861001 in words is "twenty-two billion, two hundred seventy-five million, eight hundred sixty-one thousand, one".