221092472 has 16 divisors (see below), whose sum is σ = 420228240. Its totient is φ = 109031616.

The previous prime is 221092471. The next prime is 221092489. The reversal of 221092472 is 274290122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221092471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188708 + ... + 189875.

It is an arithmetic number, because the mean of its divisors is an integer number (26264265).

Almost surely, 2^221092472 is an apocalyptic number.

It is an amenable number.

221092472 is a deficient number, since it is larger than the sum of its proper divisors (199135768).

221092472 is a wasteful number, since it uses less digits than its factorization.

221092472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378662 (or 378658 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 221092472 is about 14869.1785919734. The cubic root of 221092472 is about 604.6786737093.

The spelling of 221092472 in words is "two hundred twenty-one million, ninety-two thousand, four hundred seventy-two".