220706506 has 4 divisors (see below), whose sum is σ = 331059762. Its totient is φ = 110353252.

The previous prime is 220706503. The next prime is 220706531. The reversal of 220706506 is 605607022.

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

It can be written as a sum of positive squares in only one way, i.e., 158533281 + 62173225 = 12591^2 + 7885^2 .

It is a super-2 number, since 2×220706506² = 97422723581456072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220706503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55176625 + ... + 55176628.

Almost surely, 2^220706506 is an apocalyptic number.

220706506 is a deficient number, since it is larger than the sum of its proper divisors (110353256).

220706506 is a wasteful number, since it uses less digits than its factorization.

220706506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110353255.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 220706506 is about 14856.1941963613. The cubic root of 220706506 is about 604.3266017951.

The spelling of 220706506 in words is "two hundred twenty million, seven hundred six thousand, five hundred six".