221134244 has 12 divisors (see below), whose sum is σ = 391647984. Its totient is φ = 109234824.

The previous prime is 221134241. The next prime is 221134247. The reversal of 221134244 is 442431122.

It is an interprime number because it is at equal distance from previous prime (221134241) and next prime (221134247).

It is not an unprimeable number, because it can be changed into a prime (221134241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332702 + ... + 333365.

It is an arithmetic number, because the mean of its divisors is an integer number (32637332).

Almost surely, 2^221134244 is an apocalyptic number.

It is an amenable number.

221134244 is a deficient number, since it is larger than the sum of its proper divisors (170513740).

221134244 is a wasteful number, since it uses less digits than its factorization.

221134244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666154 (or 666152 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 221134244 is about 14870.5831761905. The cubic root of 221134244 is about 604.7167528695.

Adding to 221134244 its reverse (442431122), we get a palindrome (663565366).

The spelling of 221134244 in words is "two hundred twenty-one million, one hundred thirty-four thousand, two hundred forty-four".