131231033 has 4 divisors (see below), whose sum is σ = 131294580. Its totient is φ = 131167488.

The previous prime is 131231027. The next prime is 131231039. The reversal of 131231033 is 330132131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330132131 = 7 ⋅47161733.

It is an interprime number because it is at equal distance from previous prime (131231027) and next prime (131231039).

It can be written as a sum of positive squares in 2 ways, for example, as 69089344 + 62141689 = 8312^2 + 7883^2 .

It is a cyclic number.

It is not a de Polignac number, because 131231033 - 2¹⁸ = 130968889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131231039) 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, 28568 + ... + 32841.

It is an arithmetic number, because the mean of its divisors is an integer number (32823645).

Almost surely, 2^131231033 is an apocalyptic number.

It is an amenable number.

131231033 is a deficient number, since it is larger than the sum of its proper divisors (63547).

131231033 is an equidigital number, since it uses as much as digits as its factorization.

131231033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63546.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 131231033 is about 11455.6114197366. The cubic root of 131231033 is about 508.1736972412.

Adding to 131231033 its reverse (330132131), we get a palindrome (461363164).

The spelling of 131231033 in words is "one hundred thirty-one million, two hundred thirty-one thousand, thirty-three".