220997168 has 40 divisors (see below), whose sum is σ = 506232480. Its totient is φ = 91445760.

The previous prime is 220997129. The next prime is 220997201. The reversal of 220997168 is 861799022.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30773 + ... + 37268.

It is an arithmetic number, because the mean of its divisors is an integer number (12655812).

Almost surely, 2^220997168 is an apocalyptic number.

220997168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

220997168 is an abundant number, since it is smaller than the sum of its proper divisors (285235312).

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

220997168 is a wasteful number, since it uses less digits than its factorization.

220997168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68085 (or 68079 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 220997168 is about 14865.9734965457. The cubic root of 220997168 is about 604.5917770695.

The spelling of 220997168 in words is "two hundred twenty million, nine hundred ninety-seven thousand, one hundred sixty-eight".