221042514 has 128 divisors (see below), whose sum is σ = 577492992. Its totient is φ = 54743040.

The previous prime is 221042509. The next prime is 221042519. The reversal of 221042514 is 415240122.

221042514 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221042509) and next prime (221042519).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221042519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1145202 + ... + 1145394.

It is an arithmetic number, because the mean of its divisors is an integer number (4511664).

Almost surely, 2^221042514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221042514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288746496).

221042514 is an abundant number, since it is smaller than the sum of its proper divisors (356450478).

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

221042514 is a wasteful number, since it uses less digits than its factorization.

221042514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 221042514 is about 14867.4985791155. The cubic root of 221042514 is about 604.6331259309.

Adding to 221042514 its reverse (415240122), we get a palindrome (636282636).

The spelling of 221042514 in words is "two hundred twenty-one million, forty-two thousand, five hundred fourteen".