220320356 has 6 divisors (see below), whose sum is σ = 385560630. Its totient is φ = 110160176.

The previous prime is 220320329. The next prime is 220320403. The reversal of 220320356 is 653023022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 216384100 + 3936256 = 14710^2 + 1984^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27540041 + ... + 27540048.

It is an arithmetic number, because the mean of its divisors is an integer number (64260105).

Almost surely, 2^220320356 is an apocalyptic number.

It is an amenable number.

220320356 is a deficient number, since it is larger than the sum of its proper divisors (165240274).

220320356 is a wasteful number, since it uses less digits than its factorization.

220320356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55080093 (or 55080091 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 220320356 is about 14843.1922442580. The cubic root of 220320356 is about 603.9739510424.

Adding to 220320356 its reverse (653023022), we get a palindrome (873343378).

The spelling of 220320356 in words is "two hundred twenty million, three hundred twenty thousand, three hundred fifty-six".