221617275020 has 24 divisors (see below), whose sum is σ = 465481480464. Its totient is φ = 88630680896.

The previous prime is 221617275013. The next prime is 221617275053. The reversal of 221617275020 is 20572716122.

It is a super-2 number, since 2×221617275020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 902042 + ... + 1121121.

It is an arithmetic number, because the mean of its divisors is an integer number (19395061686).

Almost surely, 2^221617275020 is an apocalyptic number.

221617275020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221617275020 is an abundant number, since it is smaller than the sum of its proper divisors (243864205444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221617275020 is a wasteful number, since it uses less digits than its factorization.

221617275020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028649 (or 2028647 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 221617275020 in words is "two hundred twenty-one billion, six hundred seventeen million, two hundred seventy-five thousand, twenty".