222500661 has 8 divisors (see below), whose sum is σ = 297495360. Its totient is φ = 147919872.

The previous prime is 222500653. The next prime is 222500687. The reversal of 222500661 is 166005222.

222500661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 222500661 - 2³ = 222500653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222500461) 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, 102220 + ... + 104373.

It is an arithmetic number, because the mean of its divisors is an integer number (37186920).

Almost surely, 2^222500661 is an apocalyptic number.

It is an amenable number.

222500661 is a deficient number, since it is larger than the sum of its proper divisors (74994699).

222500661 is a wasteful number, since it uses less digits than its factorization.

222500661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206955.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 222500661 is about 14916.4560469302. The cubic root of 222500661 is about 605.9597371108.

Adding to 222500661 its reverse (166005222), we get a palindrome (388505883).

The spelling of 222500661 in words is "two hundred twenty-two million, five hundred thousand, six hundred sixty-one".