221300156 has 48 divisors (see below), whose sum is σ = 484012032. Its totient is φ = 86011200.

The previous prime is 221300143. The next prime is 221300159. The reversal of 221300156 is 651003122.

221300156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221300159) 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, 203045 + ... + 204131.

It is an arithmetic number, because the mean of its divisors is an integer number (10083584).

Almost surely, 2^221300156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221300156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242006016).

221300156 is an abundant number, since it is smaller than the sum of its proper divisors (262711876).

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

221300156 is a wasteful number, since it uses less digits than its factorization.

221300156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 221300156 is about 14876.1606606006. The cubic root of 221300156 is about 604.8679501435.

Adding to 221300156 its reverse (651003122), we get a palindrome (872303278).

The spelling of 221300156 in words is "two hundred twenty-one million, three hundred thousand, one hundred fifty-six".