221495814 has 24 divisors (see below), whose sum is σ = 484858920. Its totient is φ = 73070208.

The previous prime is 221495809. The next prime is 221495849. The reversal of 221495814 is 418594122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61684 + ... + 65175.

It is an arithmetic number, because the mean of its divisors is an integer number (20202455).

Almost surely, 2^221495814 is an apocalyptic number.

221495814 is an abundant number, since it is smaller than the sum of its proper divisors (263363106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221495814 is a wasteful number, since it uses less digits than its factorization.

221495814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126964 (or 126961 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 221495814 is about 14882.7354340524. The cubic root of 221495814 is about 605.0461581703.

The spelling of 221495814 in words is "two hundred twenty-one million, four hundred ninety-five thousand, eight hundred fourteen".