221099996 has 18 divisors (see below), whose sum is σ = 418979232. Its totient is φ = 102045840.

The previous prime is 221099993. The next prime is 221099999. The reversal of 221099996 is 699990122.

It is an interprime number because it is at equal distance from previous prime (221099993) and next prime (221099999).

It is a self number, because there is not a number n which added to its sum of digits gives 221099996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221099993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162860 + ... + 164211.

It is an arithmetic number, because the mean of its divisors is an integer number (23276624).

Almost surely, 2^221099996 is an apocalyptic number.

221099996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221099996 is a deficient number, since it is larger than the sum of its proper divisors (197879236).

221099996 is a wasteful number, since it uses less digits than its factorization.

221099996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327101 (or 327086 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 221099996 is about 14869.4315963994. The cubic root of 221099996 is about 604.6855329067.

The spelling of 221099996 in words is "two hundred twenty-one million, ninety-nine thousand, nine hundred ninety-six".