22277765 has 12 divisors (see below), whose sum is σ = 27327756. Its totient is φ = 17434368.

The previous prime is 22277743. The next prime is 22277779. The reversal of 22277765 is 56777222.

It can be written as a sum of positive squares in 2 ways, for example, as 13786369 + 8491396 = 3713^2 + 2914^2 .

It is not a de Polignac number, because 22277765 - 2¹⁰ = 22276741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10037 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (2277313).

Almost surely, 2^22277765 is an apocalyptic number.

It is an amenable number.

22277765 is a deficient number, since it is larger than the sum of its proper divisors (5049991).

22277765 is an equidigital number, since it uses as much as digits as its factorization.

22277765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116 (or 2069 counting only the distinct ones).

The product of its digits is 82320, while the sum is 38.

The square root of 22277765 is about 4719.9327325715. The cubic root of 22277765 is about 281.3782598540.

The spelling of 22277765 in words is "twenty-two million, two hundred seventy-seven thousand, seven hundred sixty-five".