220541812 has 18 divisors (see below), whose sum is σ = 398806674. Its totient is φ = 106711920.

The previous prime is 220541809. The next prime is 220541921. The reversal of 220541812 is 218145022.

220541812 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 217739536 + 2802276 = 14756^2 + 1674^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24843 + ... + 32530.

Almost surely, 2^220541812 is an apocalyptic number.

It is an amenable number.

220541812 is a deficient number, since it is larger than the sum of its proper divisors (178264862).

220541812 is a wasteful number, since it uses less digits than its factorization.

220541812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57439 (or 57406 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 220541812 is about 14850.6502214550. The cubic root of 220541812 is about 604.1762456592.

Adding to 220541812 its reverse (218145022), we get a palindrome (438686834).

The spelling of 220541812 in words is "two hundred twenty million, five hundred forty-one thousand, eight hundred twelve".