131243434 has 16 divisors (see below), whose sum is σ = 238223808. Its totient is φ = 52938432.

The previous prime is 131243347. The next prime is 131243443. The reversal of 131243434 is 434342131.

131243434 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×131243434² = 34449677936224712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131243399 and 131243408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275484 + ... + 275959.

It is an arithmetic number, because the mean of its divisors is an integer number (14888988).

Almost surely, 2^131243434 is an apocalyptic number.

131243434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131243434 is a deficient number, since it is larger than the sum of its proper divisors (106980374).

131243434 is a wasteful number, since it uses less digits than its factorization.

131243434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551469.

The product of its digits is 3456, while the sum is 25.

The square root of 131243434 is about 11456.1526700721. The cubic root of 131243434 is about 508.1897037791.

Adding to 131243434 its reverse (434342131), we get a palindrome (565585565).

The spelling of 131243434 in words is "one hundred thirty-one million, two hundred forty-three thousand, four hundred thirty-four".