222725661 has 8 divisors (see below), whose sum is σ = 297071424. Its totient is φ = 148431840.

The previous prime is 222725627. The next prime is 222725689. The reversal of 222725661 is 166527222.

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

It is not a de Polignac number, because 222725661 - 2⁹ = 222725149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222725611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 21161.

It is an arithmetic number, because the mean of its divisors is an integer number (37133928).

Almost surely, 2^222725661 is an apocalyptic number.

It is an amenable number.

222725661 is a deficient number, since it is larger than the sum of its proper divisors (74345763).

222725661 is a wasteful number, since it uses less digits than its factorization.

222725661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25971.

The product of its digits is 20160, while the sum is 33.

The square root of 222725661 is about 14923.9961471450. The cubic root of 222725661 is about 606.1639237839.

The spelling of 222725661 in words is "two hundred twenty-two million, seven hundred twenty-five thousand, six hundred sixty-one".