159172031 has 4 divisors (see below), whose sum is σ = 159214512. Its totient is φ = 159129552.

The previous prime is 159172019. The next prime is 159172043. The reversal of 159172031 is 130271951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130271951 = 31 ⋅4202321.

It is an interprime number because it is at equal distance from previous prime (159172019) and next prime (159172043).

It is a cyclic number.

It is not a de Polignac number, because 159172031 - 2¹⁰ = 159171007 is a prime.

It is a super-2 number, since 2×159172031² = 50671470905329922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159171985 and 159172003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159172001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15011 + ... + 23316.

It is an arithmetic number, because the mean of its divisors is an integer number (39803628).

Almost surely, 2^159172031 is an apocalyptic number.

159172031 is a deficient number, since it is larger than the sum of its proper divisors (42481).

159172031 is an equidigital number, since it uses as much as digits as its factorization.

159172031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42480.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 159172031 is about 12616.3398416498. The cubic root of 159172031 is about 541.9454643458.

The spelling of 159172031 in words is "one hundred fifty-nine million, one hundred seventy-two thousand, thirty-one".