221698796 has 12 divisors (see below), whose sum is σ = 423243240. Its totient is φ = 100772160.

The previous prime is 221698781. The next prime is 221698831. The reversal of 221698796 is 697896122.

It is a happy number.

It is a super-2 number, since 2×221698796² = 98300712295699232, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2519261 + ... + 2519348.

It is an arithmetic number, because the mean of its divisors is an integer number (35270270).

Almost surely, 2^221698796 is an apocalyptic number.

It is an amenable number.

221698796 is a deficient number, since it is larger than the sum of its proper divisors (201544444).

221698796 is a wasteful number, since it uses less digits than its factorization.

221698796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038624 (or 5038622 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 221698796 is about 14889.5532505176. The cubic root of 221698796 is about 605.2309261202.

The spelling of 221698796 in words is "two hundred twenty-one million, six hundred ninety-eight thousand, seven hundred ninety-six".