220532612881 has 27 divisors (see below), whose sum is σ = 260383629051. Its totient is φ = 186235658784.

The previous prime is 220532612873. The next prime is 220532612953. The reversal of 220532612881 is 188216235022.

The square root of 220532612881 is 469609.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 125185054225 + 95347558656 = 353815^2 + 308784^2 .

It is not a de Polignac number, because 220532612881 - 2³ = 220532612873 is a prime.

It is a super-2 number, since 2×220532612881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220532612821) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 239969740 + ... + 239970658.

It is an arithmetic number, because the mean of its divisors is an integer number (9643838113).

Almost surely, 2^220532612881 is an apocalyptic number.

220532612881 is the 469609-th square number.

220532612881 is the 234805-th centered octagonal number.

It is an amenable number.

220532612881 is a deficient number, since it is larger than the sum of its proper divisors (39851016170).

220532612881 is an frugal number, since it uses more digits than its factorization.

220532612881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 220532612881 in words is "two hundred twenty billion, five hundred thirty-two million, six hundred twelve thousand, eight hundred eighty-one".