220527997 has 4 divisors (see below), whose sum is σ = 220924476. Its totient is φ = 220131520.

The previous prime is 220527943. The next prime is 220528001. The reversal of 220527997 is 799725022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8213956 + 212314041 = 2866^2 + 14571^2 .

It is a cyclic number.

It is not a de Polignac number, because 220527997 - 2²⁷ = 86310269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220507997) 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, 197404 + ... + 198517.

It is an arithmetic number, because the mean of its divisors is an integer number (55231119).

Almost surely, 2^220527997 is an apocalyptic number.

It is an amenable number.

220527997 is a deficient number, since it is larger than the sum of its proper divisors (396479).

220527997 is an equidigital number, since it uses as much as digits as its factorization.

220527997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396478.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 220527997 is about 14850.1850830217. The cubic root of 220527997 is about 604.1636299575.

The spelling of 220527997 in words is "two hundred twenty million, five hundred twenty-seven thousand, nine hundred ninety-seven".