220772907 has 12 divisors (see below), whose sum is σ = 319802184. Its totient is φ = 146762880.

The previous prime is 220772813. The next prime is 220772921. The reversal of 220772907 is 709277022.

220772907 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 220772907 - 2¹⁵ = 220740139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220772947) 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, 31569 + ... + 37922.

It is an arithmetic number, because the mean of its divisors is an integer number (26650182).

Almost surely, 2^220772907 is an apocalyptic number.

220772907 is a deficient number, since it is larger than the sum of its proper divisors (99029277).

220772907 is a wasteful number, since it uses less digits than its factorization.

220772907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69850 (or 69847 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 220772907 is about 14858.4288200334. The cubic root of 220772907 is about 604.3872009256.

The spelling of 220772907 in words is "two hundred twenty million, seven hundred seventy-two thousand, nine hundred seven".