220656545 has 4 divisors (see below), whose sum is σ = 264787860. Its totient is φ = 176525232.

The previous prime is 220656539. The next prime is 220656551. The reversal of 220656545 is 545656022.

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

It is an interprime number because it is at equal distance from previous prime (220656539) and next prime (220656551).

It can be written as a sum of positive squares in 2 ways, for example, as 121793296 + 98863249 = 11036^2 + 9943^2 .

It is a cyclic number.

It is not a de Polignac number, because 220656545 - 2⁴ = 220656529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22065650 + ... + 22065659.

It is an arithmetic number, because the mean of its divisors is an integer number (66196965).

Almost surely, 2^220656545 is an apocalyptic number.

It is an amenable number.

220656545 is a deficient number, since it is larger than the sum of its proper divisors (44131315).

220656545 is an equidigital number, since it uses as much as digits as its factorization.

220656545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44131314.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 220656545 is about 14854.5126140173. The cubic root of 220656545 is about 604.2809981857.

The spelling of 220656545 in words is "two hundred twenty million, six hundred fifty-six thousand, five hundred forty-five".