221650868 has 24 divisors (see below), whose sum is σ = 411231744. Its totient is φ = 104349600.

The previous prime is 221650861. The next prime is 221650883. The reversal of 221650868 is 868056122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221650861) 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, 19568 + ... + 28743.

It is an arithmetic number, because the mean of its divisors is an integer number (17134656).

Almost surely, 2^221650868 is an apocalyptic number.

It is an amenable number.

221650868 is a deficient number, since it is larger than the sum of its proper divisors (189580876).

221650868 is a wasteful number, since it uses less digits than its factorization.

221650868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48383 (or 48381 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 221650868 is about 14887.9437129511. The cubic root of 221650868 is about 605.1873089860.

The spelling of 221650868 in words is "two hundred twenty-one million, six hundred fifty thousand, eight hundred sixty-eight".