131242431 has 16 divisors (see below), whose sum is σ = 186991200. Its totient is φ = 81589248.

The previous prime is 131242417. The next prime is 131242453. The reversal of 131242431 is 134242131.

It is not a de Polignac number, because 131242431 - 2⁵ = 131242399 is a prime.

It is a super-2 number, since 2×131242431² = 34449151389579522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131242398 and 131242407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131242931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6246 + ... + 17363.

It is an arithmetic number, because the mean of its divisors is an integer number (11686950).

Almost surely, 2^131242431 is an apocalyptic number.

131242431 is a deficient number, since it is larger than the sum of its proper divisors (55748769).

131242431 is a wasteful number, since it uses less digits than its factorization.

131242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23738.

The product of its digits is 576, while the sum is 21.

The square root of 131242431 is about 11456.1088943847. The cubic root of 131242431 is about 508.1884091986.

Adding to 131242431 its reverse (134242131), we get a palindrome (265484562).

The spelling of 131242431 in words is "one hundred thirty-one million, two hundred forty-two thousand, four hundred thirty-one".