172159019 has 16 divisors (see below), whose sum is σ = 186372000. Its totient is φ = 158526720.

The previous prime is 172158997. The next prime is 172159033. The reversal of 172159019 is 910951271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172159019 is a prime.

It is a super-2 number, since 2×172159019² = 59277455646084722, 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 172159019.

It is not an unprimeable number, because it can be changed into a prime (172159319) 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, 102317 + ... + 103985.

It is an arithmetic number, because the mean of its divisors is an integer number (11648250).

Almost surely, 2^172159019 is an apocalyptic number.

172159019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

172159019 is a deficient number, since it is larger than the sum of its proper divisors (14212981).

172159019 is a wasteful number, since it uses less digits than its factorization.

172159019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 172159019 is about 13120.9381905411. The cubic root of 172159019 is about 556.3011099105.

The spelling of 172159019 in words is "one hundred seventy-two million, one hundred fifty-nine thousand, nineteen".