220474247 has 4 divisors (see below), whose sum is σ = 251970576. Its totient is φ = 188977920.

The previous prime is 220474217. The next prime is 220474253. The reversal of 220474247 is 742474022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742474022 = 2 ⋅371237011.

It is a cyclic number.

It is not a de Polignac number, because 220474247 - 2⁶ = 220474183 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 (220474217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15748154 + ... + 15748167.

It is an arithmetic number, because the mean of its divisors is an integer number (62992644).

Almost surely, 2^220474247 is an apocalyptic number.

220474247 is a deficient number, since it is larger than the sum of its proper divisors (31496329).

220474247 is an equidigital number, since it uses as much as digits as its factorization.

220474247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31496328.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 220474247 is about 14848.3752309807. The cubic root of 220474247 is about 604.1145410524.

The spelling of 220474247 in words is "two hundred twenty million, four hundred seventy-four thousand, two hundred forty-seven".