22277222772 has 48 divisors (see below), whose sum is σ = 59462793600. Its totient is φ = 6358828032.

The previous prime is 22277222729. The next prime is 22277222837. The reversal of 22277222772 is 27722277222.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent 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, 38293 + ... + 214524.

It is an arithmetic number, because the mean of its divisors is an integer number (1238808200).

Almost surely, 2^22277222772 is an apocalyptic number.

It is an amenable number.

22277222772 is an abundant number, since it is smaller than the sum of its proper divisors (37185570828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22277222772 is a wasteful number, since it uses less digits than its factorization.

22277222772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253880 (or 253878 counting only the distinct ones).

The product of its digits is 307328, while the sum is 42.

Adding to 22277222772 its reverse (27722277222), we get a palindrome (49999499994).

The spelling of 22277222772 in words is "twenty-two billion, two hundred seventy-seven million, two hundred twenty-two thousand, seven hundred seventy-two".