220620261 has 4 divisors (see below), whose sum is σ = 294160352. Its totient is φ = 147080172.

The previous prime is 220620223. The next prime is 220620263. The reversal of 220620261 is 162026022.

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 not a de Polignac number, because 220620261 - 2¹¹ = 220618213 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 (220620263) 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, 36770041 + ... + 36770046.

It is an arithmetic number, because the mean of its divisors is an integer number (73540088).

Almost surely, 2^220620261 is an apocalyptic number.

It is an amenable number.

220620261 is a deficient number, since it is larger than the sum of its proper divisors (73540091).

220620261 is an equidigital number, since it uses as much as digits as its factorization.

220620261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73540090.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 220620261 is about 14853.2912514365. The cubic root of 220620261 is about 604.2478744101.

Adding to 220620261 its reverse (162026022), we get a palindrome (382646283).

The spelling of 220620261 in words is "two hundred twenty million, six hundred twenty thousand, two hundred sixty-one".