22277782081 has 4 divisors (see below), whose sum is σ = 22582957252. Its totient is φ = 21972606912.

The previous prime is 22277782069. The next prime is 22277782091. The reversal of 22277782081 is 18028777222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18028777222 = 2 ⋅9014388611.

It can be written as a sum of positive squares in 2 ways, for example, as 7208010000 + 15069772081 = 84900^2 + 122759^2 .

It is a cyclic number.

It is not a de Polignac number, because 22277782081 - 2⁹ = 22277781569 is a prime.

It is a super-2 number, since 2×22277782081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22277782091) 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, 152587476 + ... + 152587621.

It is an arithmetic number, because the mean of its divisors is an integer number (5645739313).

Almost surely, 2^22277782081 is an apocalyptic number.

It is an amenable number.

22277782081 is a deficient number, since it is larger than the sum of its proper divisors (305175171).

22277782081 is an equidigital number, since it uses as much as digits as its factorization.

22277782081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305175170.

The product of its (nonzero) digits is 351232, while the sum is 46.

The spelling of 22277782081 in words is "twenty-two billion, two hundred seventy-seven million, seven hundred eighty-two thousand, eighty-one".