131448321 has 12 divisors (see below), whose sum is σ = 193452948. Its totient is φ = 85978464.

The previous prime is 131448313. The next prime is 131448347. The reversal of 131448321 is 123844131.

It can be written as a sum of positive squares in 2 ways, for example, as 76317696 + 55130625 = 8736^2 + 7425^2 .

It is not a de Polignac number, because 131448321 - 2³ = 131448313 is a prime.

It is a super-2 number, since 2×131448321² = 34557322187438082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131448371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137310 + ... + 138263.

It is an arithmetic number, because the mean of its divisors is an integer number (16121079).

Almost surely, 2^131448321 is an apocalyptic number.

It is an amenable number.

131448321 is a deficient number, since it is larger than the sum of its proper divisors (62004627).

131448321 is a wasteful number, since it uses less digits than its factorization.

131448321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275632 (or 275629 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 131448321 is about 11465.0914082706. The cubic root of 131448321 is about 508.4540149794.

It can be divided in two parts, 131448 and 321, that added together give a square (131769 = 363²).

The spelling of 131448321 in words is "one hundred thirty-one million, four hundred forty-eight thousand, three hundred twenty-one".