220478641 has 8 divisors (see below), whose sum is σ = 232351200. Its totient is φ = 208632960.

The previous prime is 220478623. The next prime is 220478663. The reversal of 220478641 is 146874022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220478641 - 2¹³ = 220470449 is a prime.

It is a super-2 number, since 2×220478641² = 97221662274413762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220478597 and 220478606.

It is not an unprimeable number, because it can be changed into a prime (220478941) 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 7 ways as a sum of consecutive naturals, for example, 11406 + ... + 23896.

It is an arithmetic number, because the mean of its divisors is an integer number (29043900).

Almost surely, 2^220478641 is an apocalyptic number.

It is an amenable number.

220478641 is a deficient number, since it is larger than the sum of its proper divisors (11872559).

220478641 is a wasteful number, since it uses less digits than its factorization.

220478641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 220478641 is about 14848.5231925603. The cubic root of 220478641 is about 604.1185543127.

The spelling of 220478641 in words is "two hundred twenty million, four hundred seventy-eight thousand, six hundred forty-one".