221952550 has 24 divisors (see below), whose sum is σ = 416928672. Its totient is φ = 87900000.

The previous prime is 221952539. The next prime is 221952583. The reversal of 221952550 is 55259122.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 16926 + ... + 27025.

It is an arithmetic number, because the mean of its divisors is an integer number (17372028).

Almost surely, 2^221952550 is an apocalyptic number.

221952550 is a deficient number, since it is larger than the sum of its proper divisors (194976122).

221952550 is a wasteful number, since it uses less digits than its factorization.

221952550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44064 (or 44059 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 221952550 is about 14898.0720229163. The cubic root of 221952550 is about 605.4617516264.

The spelling of 221952550 in words is "two hundred twenty-one million, nine hundred fifty-two thousand, five hundred fifty".