131168531 has 4 divisors (see below), whose sum is σ = 141258432. Its totient is φ = 121078632.

The previous prime is 131168507. The next prime is 131168539. The reversal of 131168531 is 135861131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135861131 = 7 ⋅19408733.

It is a cyclic number.

It is not a de Polignac number, because 131168531 - 2¹⁸ = 130906387 is a prime.

It is a super-2 number, since 2×131168531² = 34410367049395922, 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 = 131168494 and 131168503.

It is not an unprimeable number, because it can be changed into a prime (131168539) 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, 5044931 + ... + 5044956.

It is an arithmetic number, because the mean of its divisors is an integer number (35314608).

Almost surely, 2^131168531 is an apocalyptic number.

131168531 is a deficient number, since it is larger than the sum of its proper divisors (10089901).

131168531 is a wasteful number, since it uses less digits than its factorization.

131168531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10089900.

The product of its digits is 2160, while the sum is 29.

The square root of 131168531 is about 11452.8830868040. The cubic root of 131168531 is about 508.0930076983.

The spelling of 131168531 in words is "one hundred thirty-one million, one hundred sixty-eight thousand, five hundred thirty-one".