220155617 has 8 divisors (see below), whose sum is σ = 248451840. Its totient is φ = 193239760.

The previous prime is 220155613. The next prime is 220155623. The reversal of 220155617 is 716551022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220155617 - 2² = 220155613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220155617.

It is not an unprimeable number, because it can be changed into a prime (220155613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344753 + ... + 345390.

It is an arithmetic number, because the mean of its divisors is an integer number (31056480).

Almost surely, 2^220155617 is an apocalyptic number.

It is an amenable number.

220155617 is a deficient number, since it is larger than the sum of its proper divisors (28296223).

220155617 is a wasteful number, since it uses less digits than its factorization.

220155617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690183.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 220155617 is about 14837.6418948565. The cubic root of 220155617 is about 603.8233780679.

The spelling of 220155617 in words is "two hundred twenty million, one hundred fifty-five thousand, six hundred seventeen".