220321156 has 36 divisors (see below), whose sum is σ = 448745724. Its totient is φ = 94251520.

The previous prime is 220321151. The next prime is 220321181. The reversal of 220321156 is 651123022.

It can be written as a sum of positive squares in 2 ways, for example, as 99321156 + 121000000 = 9966^2 + 11000^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (220321151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5161 + ... + 21616.

It is an arithmetic number, because the mean of its divisors is an integer number (12465159).

Almost surely, 2^220321156 is an apocalyptic number.

It is an amenable number.

220321156 is an abundant number, since it is smaller than the sum of its proper divisors (228424568).

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

220321156 is a wasteful number, since it uses less digits than its factorization.

220321156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26820 (or 26807 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 220321156 is about 14843.2191926145. The cubic root of 220321156 is about 603.9746820667.

Adding to 220321156 its reverse (651123022), we get a palindrome (871444178).

The spelling of 220321156 in words is "two hundred twenty million, three hundred twenty-one thousand, one hundred fifty-six".