220705139 has 4 divisors (see below), whose sum is σ = 220920240. Its totient is φ = 220490040.

The previous prime is 220705117. The next prime is 220705153. The reversal of 220705139 is 931507022.

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 220705139 - 2²⁴ = 203927923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220705189) 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, 106004 + ... + 108065.

It is an arithmetic number, because the mean of its divisors is an integer number (55230060).

Almost surely, 2^220705139 is an apocalyptic number.

220705139 is a deficient number, since it is larger than the sum of its proper divisors (215101).

220705139 is a wasteful number, since it uses less digits than its factorization.

220705139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215100.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 220705139 is about 14856.1481885447. The cubic root of 220705139 is about 604.3253541107.

The spelling of 220705139 in words is "two hundred twenty million, seven hundred five thousand, one hundred thirty-nine".