221442827 has 16 divisors (see below), whose sum is σ = 240371712. Its totient is φ = 203396160.

The previous prime is 221442787. The next prime is 221442841. The reversal of 221442827 is 728244122.

It is a cyclic number.

It is not a de Polignac number, because 221442827 - 2¹² = 221438731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221442793 and 221442802.

It is not an unprimeable number, because it can be changed into a prime (221442847) 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, 96548 + ... + 98814.

It is an arithmetic number, because the mean of its divisors is an integer number (15023232).

Almost surely, 2^221442827 is an apocalyptic number.

221442827 is a deficient number, since it is larger than the sum of its proper divisors (18928885).

221442827 is a wasteful number, since it uses less digits than its factorization.

221442827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458.

The product of its digits is 14336, while the sum is 32.

The square root of 221442827 is about 14880.9551776759. The cubic root of 221442827 is about 604.9979072395.

Adding to 221442827 its reverse (728244122), we get a palindrome (949686949).

The spelling of 221442827 in words is "two hundred twenty-one million, four hundred forty-two thousand, eight hundred twenty-seven".