220661051 has 4 divisors (see below), whose sum is σ = 237634992. Its totient is φ = 203687112.

The previous prime is 220661009. The next prime is 220661059. The reversal of 220661051 is 150166022.

220661051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220661051 - 2⁶ = 220660987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220661059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8486951 + ... + 8486976.

It is an arithmetic number, because the mean of its divisors is an integer number (59408748).

Almost surely, 2^220661051 is an apocalyptic number.

220661051 is a deficient number, since it is larger than the sum of its proper divisors (16973941).

220661051 is a wasteful number, since it uses less digits than its factorization.

220661051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16973940.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 220661051 is about 14854.6642843250. The cubic root of 220661051 is about 604.2851114735.

The spelling of 220661051 in words is "two hundred twenty million, six hundred sixty-one thousand, fifty-one".