221550963 has 16 divisors (see below), whose sum is σ = 316051200. Its totient is φ = 137630880.

The previous prime is 221550947. The next prime is 221550991. The reversal of 221550963 is 369055122.

It is not a de Polignac number, because 221550963 - 2⁴ = 221550947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221550913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28383 + ... + 35336.

It is an arithmetic number, because the mean of its divisors is an integer number (19753200).

Almost surely, 2^221550963 is an apocalyptic number.

221550963 is a deficient number, since it is larger than the sum of its proper divisors (94500237).

221550963 is a wasteful number, since it uses less digits than its factorization.

221550963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63802.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 221550963 is about 14884.5881031354. The cubic root of 221550963 is about 605.0963696860.

The spelling of 221550963 in words is "two hundred twenty-one million, five hundred fifty thousand, nine hundred sixty-three".