172260655 has 16 divisors (see below), whose sum is σ = 239482944. Its totient is φ = 116501760.

The previous prime is 172260637. The next prime is 172260659. The reversal of 172260655 is 556062271.

It is a de Polignac number, because none of the positive numbers 2^k-172260655 is a prime.

It is a super-2 number, since 2×172260655² = 59347466522058050, which contains 22 as substring.

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 172260655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172260659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31156 + ... + 36265.

It is an arithmetic number, because the mean of its divisors is an integer number (14967684).

Almost surely, 2^172260655 is an apocalyptic number.

172260655 is a deficient number, since it is larger than the sum of its proper divisors (67222289).

172260655 is an equidigital number, since it uses as much as digits as its factorization.

172260655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67506.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 172260655 is about 13124.8106653010. The cubic root of 172260655 is about 556.4105612329.

The spelling of 172260655 in words is "one hundred seventy-two million, two hundred sixty thousand, six hundred fifty-five".