220557197 has 4 divisors (see below), whose sum is σ = 252065376. Its totient is φ = 189049020.

The previous prime is 220557193. The next prime is 220557199. The reversal of 220557197 is 791755022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220557197 - 2² = 220557193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220557197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220557193) 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, 15754079 + ... + 15754092.

It is an arithmetic number, because the mean of its divisors is an integer number (63016344).

Almost surely, 2^220557197 is an apocalyptic number.

It is an amenable number.

220557197 is a deficient number, since it is larger than the sum of its proper divisors (31508179).

220557197 is an equidigital number, since it uses as much as digits as its factorization.

220557197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31508178.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 220557197 is about 14851.1682032088. The cubic root of 220557197 is about 604.1902944471.

The spelling of 220557197 in words is "two hundred twenty million, five hundred fifty-seven thousand, one hundred ninety-seven".