131413731 has 4 divisors (see below), whose sum is σ = 175218312. Its totient is φ = 87609152.

The previous prime is 131413729. The next prime is 131413813. The reversal of 131413731 is 137314131.

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 131413731 - 2¹ = 131413729 is a prime.

It is a super-2 number, since 2×131413731² = 34539137390680722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131413721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21902286 + ... + 21902291.

It is an arithmetic number, because the mean of its divisors is an integer number (43804578).

Almost surely, 2^131413731 is an apocalyptic number.

131413731 is a deficient number, since it is larger than the sum of its proper divisors (43804581).

131413731 is an equidigital number, since it uses as much as digits as its factorization.

131413731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43804580.

The product of its digits is 756, while the sum is 24.

The square root of 131413731 is about 11463.5828169033. The cubic root of 131413731 is about 508.4094119821.

Adding to 131413731 its reverse (137314131), we get a palindrome (268727862).

The spelling of 131413731 in words is "one hundred thirty-one million, four hundred thirteen thousand, seven hundred thirty-one".