131403331 has 2 divisors, whose sum is σ = 131403332. Its totient is φ = 131403330.

The previous prime is 131403299. The next prime is 131403343. The reversal of 131403331 is 133304131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131403331 - 2⁵ = 131403299 is a prime.

It is a super-2 number, since 2×131403331² = 34533670795791122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131403299 and 131403308.

It is not a weakly prime, because it can be changed into another prime (131403131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65701665 + 65701666.

It is an arithmetic number, because the mean of its divisors is an integer number (65701666).

Almost surely, 2^131403331 is an apocalyptic number.

131403331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131403331 is an equidigital number, since it uses as much as digits as its factorization.

131403331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 131403331 is about 11463.1291975621. The cubic root of 131403331 is about 508.3959998947.

Adding to 131403331 its reverse (133304131), we get a palindrome (264707462).

It can be divided in two parts, 13140 and 3331, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 131403331 in words is "one hundred thirty-one million, four hundred three thousand, three hundred thirty-one".