221248894 has 8 divisors (see below), whose sum is σ = 332710488. Its totient is φ = 110345400.

The previous prime is 221248873. The next prime is 221248921. The reversal of 221248894 is 498842122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138532 + ... + 140119.

It is an arithmetic number, because the mean of its divisors is an integer number (41588811).

Almost surely, 2^221248894 is an apocalyptic number.

221248894 is a deficient number, since it is larger than the sum of its proper divisors (111461594).

221248894 is a wasteful number, since it uses less digits than its factorization.

221248894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279050.

The product of its digits is 73728, while the sum is 40.

The square root of 221248894 is about 14874.4376028138. The cubic root of 221248894 is about 604.8212426372.

The spelling of 221248894 in words is "two hundred twenty-one million, two hundred forty-eight thousand, eight hundred ninety-four".