131405269 has 4 divisors (see below), whose sum is σ = 131601196. Its totient is φ = 131209344.

The previous prime is 131405251. The next prime is 131405297. The reversal of 131405269 is 962504131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43758225 + 87647044 = 6615^2 + 9362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131405269 is a prime.

It is a super-2 number, since 2×131405269² = 34534689441924722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131405269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131405299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96954 + ... + 98299.

It is an arithmetic number, because the mean of its divisors is an integer number (32900299).

Almost surely, 2^131405269 is an apocalyptic number.

It is an amenable number.

131405269 is a deficient number, since it is larger than the sum of its proper divisors (195927).

131405269 is an equidigital number, since it uses as much as digits as its factorization.

131405269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195926.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 131405269 is about 11463.2137291425. The cubic root of 131405269 is about 508.3984992392.

The spelling of 131405269 in words is "one hundred thirty-one million, four hundred five thousand, two hundred sixty-nine".