221331030 has 16 divisors (see below), whose sum is σ = 531194544. Its totient is φ = 59021600.

The previous prime is 221331029. The next prime is 221331043. The reversal of 221331030 is 30133122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 3688821 + ... + 3688880.

It is an arithmetic number, because the mean of its divisors is an integer number (33199659).

Almost surely, 2^221331030 is an apocalyptic number.

221331030 is an abundant number, since it is smaller than the sum of its proper divisors (309863514).

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

221331030 is a wasteful number, since it uses less digits than its factorization.

221331030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377711.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 221331030 is about 14877.1983249535. The cubic root of 221331030 is about 604.8960775897.

Adding to 221331030 its reverse (30133122), we get a palindrome (251464152).

The spelling of 221331030 in words is "two hundred twenty-one million, three hundred thirty-one thousand, thirty".