220658641 has 4 divisors (see below), whose sum is σ = 252181312. Its totient is φ = 189135972.

The previous prime is 220658629. The next prime is 220658681. The reversal of 220658641 is 146856022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 146856022 = 2 ⋅73428011.

It is a cyclic number.

It is not a de Polignac number, because 220658641 - 2⁷ = 220658513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220658597 and 220658606.

It is not an unprimeable number, because it can be changed into a prime (220658681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15761325 + ... + 15761338.

It is an arithmetic number, because the mean of its divisors is an integer number (63045328).

Almost surely, 2^220658641 is an apocalyptic number.

It is an amenable number.

220658641 is a deficient number, since it is larger than the sum of its proper divisors (31522671).

220658641 is an equidigital number, since it uses as much as digits as its factorization.

220658641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31522670.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 220658641 is about 14854.5831648014. The cubic root of 220658641 is about 604.2829115196.

The spelling of 220658641 in words is "two hundred twenty million, six hundred fifty-eight thousand, six hundred forty-one".