220101640 has 32 divisors (see below), whose sum is σ = 540250560. Its totient is φ = 80036800.

The previous prime is 220101589. The next prime is 220101647. The reversal of 220101640 is 46101022.

It is not an unprimeable number, because it can be changed into a prime (220101647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249676 + ... + 250555.

It is an arithmetic number, because the mean of its divisors is an integer number (16882830).

Almost surely, 2^220101640 is an apocalyptic number.

220101640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220101640 is an abundant number, since it is smaller than the sum of its proper divisors (320148920).

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

220101640 is a wasteful number, since it uses less digits than its factorization.

220101640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500253 (or 500249 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 220101640 is about 14835.8228622480. The cubic root of 220101640 is about 603.7740262519.

Adding to 220101640 its reverse (46101022), we get a palindrome (266202662).

The spelling of 220101640 in words is "two hundred twenty million, one hundred one thousand, six hundred forty".