221323030 has 16 divisors (see below), whose sum is σ = 400828464. Its totient is φ = 87985440.

The previous prime is 221323019. The next prime is 221323049. The reversal of 221323030 is 30323122.

221323030 is digitally balanced in base 2, because in such base 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 = 221322995 and 221323013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66261 + ... + 69520.

It is an arithmetic number, because the mean of its divisors is an integer number (25051779).

Almost surely, 2^221323030 is an apocalyptic number.

221323030 is a deficient number, since it is larger than the sum of its proper divisors (179505434).

221323030 is a wasteful number, since it uses less digits than its factorization.

221323030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135951.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 221323030 is about 14876.9294546960. The cubic root of 221323030 is about 604.8887895215. Note that the first 3 decimals are identical.

Adding to 221323030 its reverse (30323122), we get a palindrome (251646152).

The spelling of 221323030 in words is "two hundred twenty-one million, three hundred twenty-three thousand, thirty".