221371454 has 4 divisors (see below), whose sum is σ = 332057184. Its totient is φ = 110685726.

The previous prime is 221371453. The next prime is 221371459. The reversal of 221371454 is 454173122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221371453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55342862 + ... + 55342865.

It is an arithmetic number, because the mean of its divisors is an integer number (83014296).

Almost surely, 2^221371454 is an apocalyptic number.

221371454 is a deficient number, since it is larger than the sum of its proper divisors (110685730).

221371454 is a wasteful number, since it uses less digits than its factorization.

221371454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110685729.

The product of its digits is 6720, while the sum is 29.

The square root of 221371454 is about 14878.5568520606. The cubic root of 221371454 is about 604.9329015129.

The spelling of 221371454 in words is "two hundred twenty-one million, three hundred seventy-one thousand, four hundred fifty-four".