159191172 has 36 divisors (see below), whose sum is σ = 459886336. Its totient is φ = 45483120.

The previous prime is 159191161. The next prime is 159191183. The reversal of 159191172 is 271191951.

It is an interprime number because it is at equal distance from previous prime (159191161) and next prime (159191183).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 315604 + ... + 316107.

Almost surely, 2^159191172 is an apocalyptic number.

159191172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

159191172 is an abundant number, since it is smaller than the sum of its proper divisors (300695164).

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

159191172 is a wasteful number, since it uses less digits than its factorization.

159191172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631728 (or 631723 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 159191172 is about 12617.0983986018. The cubic root of 159191172 is about 541.9671870950.

The spelling of 159191172 in words is "one hundred fifty-nine million, one hundred ninety-one thousand, one hundred seventy-two".