131445169 has 4 divisors (see below), whose sum is σ = 131502580. Its totient is φ = 131387760.

The previous prime is 131445163. The next prime is 131445203. The reversal of 131445169 is 961544131.

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 33177600 + 98267569 = 5760^2 + 9913^2 .

It is a cyclic number.

It is not a de Polignac number, because 131445169 - 2²¹ = 129348017 is a prime.

It is a super-2 number, since 2×131445169² = 34555664906877122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131445163) 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, 25122 + ... + 29899.

It is an arithmetic number, because the mean of its divisors is an integer number (32875645).

Almost surely, 2^131445169 is an apocalyptic number.

It is an amenable number.

131445169 is a deficient number, since it is larger than the sum of its proper divisors (57411).

131445169 is an equidigital number, since it uses as much as digits as its factorization.

131445169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57410.

The product of its digits is 12960, while the sum is 34.

The square root of 131445169 is about 11464.9539467021. The cubic root of 131445169 is about 508.4499508730.

The spelling of 131445169 in words is "one hundred thirty-one million, four hundred forty-five thousand, one hundred sixty-nine".