221050506 has 32 divisors (see below), whose sum is σ = 454963968. Its totient is φ = 71547840.

The previous prime is 221050483. The next prime is 221050537. The reversal of 221050506 is 605050122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201696 + ... + 202788.

It is an arithmetic number, because the mean of its divisors is an integer number (14217624).

Almost surely, 2^221050506 is an apocalyptic number.

221050506 is an abundant number, since it is smaller than the sum of its proper divisors (233913462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221050506 is a wasteful number, since it uses less digits than its factorization.

221050506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 221050506 is about 14867.7673508836. The cubic root of 221050506 is about 604.6404128695.

It can be divided in two parts, 22 and 1050506, that multiplied together give a palindrome (23111132).

The spelling of 221050506 in words is "two hundred twenty-one million, fifty thousand, five hundred six".