131166031 has 4 divisors (see below), whose sum is σ = 131193864. Its totient is φ = 131138200.

The previous prime is 131166029. The next prime is 131166059. The reversal of 131166031 is 130661131.

It is a happy number.

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 131166031 - 2¹ = 131166029 is a prime.

It is a super-2 number, since 2×131166031² = 34409055376585922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131165993 and 131166011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131166001) 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, 4900 + ... + 16921.

It is an arithmetic number, because the mean of its divisors is an integer number (32798466).

Almost surely, 2^131166031 is an apocalyptic number.

131166031 is a deficient number, since it is larger than the sum of its proper divisors (27833).

131166031 is an equidigital number, since it uses as much as digits as its factorization.

131166031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27832.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 131166031 is about 11452.7739434602. The cubic root of 131166031 is about 508.0897796867.

The spelling of 131166031 in words is "one hundred thirty-one million, one hundred sixty-six thousand, thirty-one".