159131531 has 4 divisors (see below), whose sum is σ = 171372432. Its totient is φ = 146890632.

The previous prime is 159131527. The next prime is 159131551. The reversal of 159131531 is 135131951.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 159131531 - 2² = 159131527 is a prime.

It is a super-2 number, since 2×159131531² = 50645688316807922, 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 = 159131494 and 159131503.

It is not an unprimeable number, because it can be changed into a prime (159131551) 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, 6120431 + ... + 6120456.

It is an arithmetic number, because the mean of its divisors is an integer number (42843108).

Almost surely, 2^159131531 is an apocalyptic number.

159131531 is a deficient number, since it is larger than the sum of its proper divisors (12240901).

159131531 is a wasteful number, since it uses less digits than its factorization.

159131531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240900.

The product of its digits is 2025, while the sum is 29.

The square root of 159131531 is about 12614.7346781452. The cubic root of 159131531 is about 541.8994959408.

The spelling of 159131531 in words is "one hundred fifty-nine million, one hundred thirty-one thousand, five hundred thirty-one".