221530010 has 16 divisors (see below), whose sum is σ = 429427656. Its totient is φ = 81795648.

The previous prime is 221529991. The next prime is 221530019. The reversal of 221530010 is 10035122.

It is a happy number.

221530010 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 83960569 + 137569441 = 9163^2 + 11729^2 .

It is not an unprimeable number, because it can be changed into a prime (221530019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851909 + ... + 852168.

Almost surely, 2^221530010 is an apocalyptic number.

221530010 is a deficient number, since it is larger than the sum of its proper divisors (207897646).

221530010 is a wasteful number, since it uses less digits than its factorization.

221530010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704097.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 221530010 is about 14883.8842376579. The cubic root of 221530010 is about 605.0772935876.

Adding to 221530010 its reverse (10035122), we get a palindrome (231565132).

The spelling of 221530010 in words is "two hundred twenty-one million, five hundred thirty thousand, ten".