221662042 has 16 divisors (see below), whose sum is σ = 390263040. Its totient is φ = 92430288.

The previous prime is 221662039. The next prime is 221662069. The reversal of 221662042 is 240266122.

It is a junction number, because it is equal to n+sod(n) for n = 221661998 and 221662016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213442 + ... + 214477.

It is an arithmetic number, because the mean of its divisors is an integer number (24391440).

Almost surely, 2^221662042 is an apocalyptic number.

221662042 is a deficient number, since it is larger than the sum of its proper divisors (168600998).

221662042 is a wasteful number, since it uses less digits than its factorization.

221662042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427965.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 221662042 is about 14888.3189783132. The cubic root of 221662042 is about 605.1974785068.

The spelling of 221662042 in words is "two hundred twenty-one million, six hundred sixty-two thousand, forty-two".