22778252997 has 4 divisors (see below), whose sum is σ = 30371004000. Its totient is φ = 15185501996.

The previous prime is 22778252977. The next prime is 22778253013. The reversal of 22778252997 is 79925287722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22778252997 - 2¹¹ = 22778250949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22778252997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22778252977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796375497 + ... + 3796375502.

It is an arithmetic number, because the mean of its divisors is an integer number (7592751000).

Almost surely, 2^22778252997 is an apocalyptic number.

It is an amenable number.

22778252997 is a deficient number, since it is larger than the sum of its proper divisors (7592751003).

22778252997 is an equidigital number, since it uses as much as digits as its factorization.

22778252997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7592751002.

The product of its digits is 17781120, while the sum is 60.

It can be divided in two parts, 2277825 and 2997, that added together give a palindrome (2280822).

The spelling of 22778252997 in words is "twenty-two billion, seven hundred seventy-eight million, two hundred fifty-two thousand, nine hundred ninety-seven".