22277561 has 8 divisors (see below), whose sum is σ = 23222784. Its totient is φ = 21346560.

The previous prime is 22277551. The next prime is 22277573. The reversal of 22277561 is 16577222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22277561 - 2¹⁸ = 22015417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22277551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (2902848).

Almost surely, 2^22277561 is an apocalyptic number.

It is an amenable number.

22277561 is a deficient number, since it is larger than the sum of its proper divisors (945223).

22277561 is a wasteful number, since it uses less digits than its factorization.

22277561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7111.

The product of its digits is 11760, while the sum is 32.

The square root of 22277561 is about 4719.9111220446. The cubic root of 22277561 is about 281.3774009806.

The spelling of 22277561 in words is "twenty-two million, two hundred seventy-seven thousand, five hundred sixty-one".