172220115165 has 32 divisors (see below), whose sum is σ = 314993844480. Its totient is φ = 78709929984.

The previous prime is 172220115149. The next prime is 172220115281. The reversal of 172220115165 is 561511022271.

It is not a de Polignac number, because 172220115165 - 2⁴ = 172220115149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234927 + ... + 632163.

It is an arithmetic number, because the mean of its divisors is an integer number (9843557640).

Almost surely, 2^172220115165 is an apocalyptic number.

172220115165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172220115165 is a deficient number, since it is larger than the sum of its proper divisors (142773729315).

172220115165 is a wasteful number, since it uses less digits than its factorization.

172220115165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401381.

The product of its (nonzero) digits is 8400, while the sum is 33.

The spelling of 172220115165 in words is "one hundred seventy-two billion, two hundred twenty million, one hundred fifteen thousand, one hundred sixty-five".