22245777 has 6 divisors (see below), whose sum is σ = 32132802. Its totient is φ = 14830512.

The previous prime is 22245767. The next prime is 22245779. The reversal of 22245777 is 77754222.

It can be written as a sum of positive squares in only one way, i.e., 20439441 + 1806336 = 4521^2 + 1344^2 .

It is not a de Polignac number, because 22245777 - 2⁸ = 22245521 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22245779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1235868 + ... + 1235885.

It is an arithmetic number, because the mean of its divisors is an integer number (5355467).

Almost surely, 2^22245777 is an apocalyptic number.

It is an amenable number.

22245777 is a deficient number, since it is larger than the sum of its proper divisors (9887025).

22245777 is a wasteful number, since it uses less digits than its factorization.

22245777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471759 (or 2471756 counting only the distinct ones).

The product of its digits is 54880, while the sum is 36.

The square root of 22245777 is about 4716.5429076814. The cubic root of 22245777 is about 281.2435210359.

Adding to 22245777 its reverse (77754222), we get a palindrome (99999999).

It can be divided in two parts, 2224 and 5777, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 22245777 in words is "twenty-two million, two hundred forty-five thousand, seven hundred seventy-seven".