220952161 has 4 divisors (see below), whose sum is σ = 221296432. Its totient is φ = 220607892.

The previous prime is 220952153. The next prime is 220952183. The reversal of 220952161 is 161259022.

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: 161259022 = 2 ⋅80629511.

It is a cyclic number.

It is not a de Polignac number, because 220952161 - 2³ = 220952153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220952101) 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, 171171 + ... + 172456.

It is an arithmetic number, because the mean of its divisors is an integer number (55324108).

Almost surely, 2^220952161 is an apocalyptic number.

It is an amenable number.

220952161 is a deficient number, since it is larger than the sum of its proper divisors (344271).

220952161 is an equidigital number, since it uses as much as digits as its factorization.

220952161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344270.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 220952161 is about 14864.4596605460. The cubic root of 220952161 is about 604.5507317328.

The spelling of 220952161 in words is "two hundred twenty million, nine hundred fifty-two thousand, one hundred sixty-one".