220412505 has 16 divisors (see below), whose sum is σ = 356624640. Its totient is φ = 116231808.

The previous prime is 220412461. The next prime is 220412509. The reversal of 220412505 is 505214022.

It is a happy number.

220412505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220412505 - 2⁸ = 220412249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220412509) 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, 81217 + ... + 83886.

It is an arithmetic number, because the mean of its divisors is an integer number (22289040).

Almost surely, 2^220412505 is an apocalyptic number.

It is an amenable number.

220412505 is a deficient number, since it is larger than the sum of its proper divisors (136212135).

220412505 is a wasteful number, since it uses less digits than its factorization.

220412505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165200.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 220412505 is about 14846.2960027072. The cubic root of 220412505 is about 604.0581433509.

Adding to 220412505 its reverse (505214022), we get a palindrome (725626527).

The spelling of 220412505 in words is "two hundred twenty million, four hundred twelve thousand, five hundred five".