221310030 has 32 divisors (see below), whose sum is σ = 531778464. Its totient is φ = 58945536.

The previous prime is 221309989. The next prime is 221310031. The reversal of 221310030 is 30013122.

It is a happy number.

221310030 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 is a junction number, because it is equal to n+sod(n) for n = 221309988 and 221310015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221310031) 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, 24174 + ... + 32046.

It is an arithmetic number, because the mean of its divisors is an integer number (16618077).

Almost surely, 2^221310030 is an apocalyptic number.

221310030 is an abundant number, since it is smaller than the sum of its proper divisors (310468434).

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

221310030 is a wasteful number, since it uses less digits than its factorization.

221310030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 221310030 is about 14876.4925301631. The cubic root of 221310030 is about 604.8769460361.

Adding to 221310030 its reverse (30013122), we get a palindrome (251323152).

The spelling of 221310030 in words is "two hundred twenty-one million, three hundred ten thousand, thirty".