221354814 has 16 divisors (see below), whose sum is σ = 443068560. Its totient is φ = 73725120.

The previous prime is 221354797. The next prime is 221354839. The reversal of 221354814 is 418453122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6577 + ... + 22044.

It is an arithmetic number, because the mean of its divisors is an integer number (27691785).

Almost surely, 2^221354814 is an apocalyptic number.

221354814 is an abundant number, since it is smaller than the sum of its proper divisors (221713746).

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

221354814 is a wasteful number, since it uses less digits than its factorization.

221354814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29915.

The product of its digits is 7680, while the sum is 30.

The square root of 221354814 is about 14877.9976475331. The cubic root of 221354814 is about 604.9177439794.

The spelling of 221354814 in words is "two hundred twenty-one million, three hundred fifty-four thousand, eight hundred fourteen".