222277561 has 8 divisors (see below), whose sum is σ = 255247200. Its totient is φ = 191435040.

The previous prime is 222277513. The next prime is 222277571. The reversal of 222277561 is 165772222.

It is a happy number.

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 222277561 - 2⁹ = 222277049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222277511) 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, 531556 + ... + 531973.

It is an arithmetic number, because the mean of its divisors is an integer number (31905900).

Almost surely, 2^222277561 is an apocalyptic number.

It is an amenable number.

222277561 is a deficient number, since it is larger than the sum of its proper divisors (32969639).

222277561 is a wasteful number, since it uses less digits than its factorization.

222277561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063559.

The product of its digits is 23520, while the sum is 34.

The square root of 222277561 is about 14908.9758534917. The cubic root of 222277561 is about 605.7571387208.

The spelling of 222277561 in words is "two hundred twenty-two million, two hundred seventy-seven thousand, five hundred sixty-one".