131213429 has 8 divisors (see below), whose sum is σ = 143723160. Its totient is φ = 119236096.

The previous prime is 131213417. The next prime is 131213441. The reversal of 131213429 is 924312131.

It is an interprime number because it is at equal distance from previous prime (131213417) and next prime (131213441).

It can be written as a sum of positive squares in 4 ways, for example, as 47582404 + 83631025 = 6898^2 + 9145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-131213429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131213398 and 131213407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131213029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132584 + ... + 133569.

It is an arithmetic number, because the mean of its divisors is an integer number (17965395).

Almost surely, 2^131213429 is an apocalyptic number.

It is an amenable number.

131213429 is a deficient number, since it is larger than the sum of its proper divisors (12509731).

131213429 is a wasteful number, since it uses less digits than its factorization.

131213429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266199.

The product of its digits is 1296, while the sum is 26.

The square root of 131213429 is about 11454.8430368993. The cubic root of 131213429 is about 508.1509732213.

It can be divided in two parts, 1312 and 13429, that added together give a palindrome (14741).

The spelling of 131213429 in words is "one hundred thirty-one million, two hundred thirteen thousand, four hundred twenty-nine".