220620771 has 12 divisors (see below), whose sum is σ = 364199472. Its totient is φ = 126068976.

The previous prime is 220620739. The next prime is 220620779. The reversal of 220620771 is 177026022.

It is not a de Polignac number, because 220620771 - 2⁵ = 220620739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220620779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1750896 + ... + 1751021.

It is an arithmetic number, because the mean of its divisors is an integer number (30349956).

Almost surely, 2^220620771 is an apocalyptic number.

220620771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

220620771 is a deficient number, since it is larger than the sum of its proper divisors (143578701).

220620771 is a wasteful number, since it uses less digits than its factorization.

220620771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501930 (or 3501927 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 220620771 is about 14853.3084193388. The cubic root of 220620771 is about 604.2483400158.

Adding to 220620771 its reverse (177026022), we get a palindrome (397646793).

The spelling of 220620771 in words is "two hundred twenty million, six hundred twenty thousand, seven hundred seventy-one".