131043445 has 12 divisors (see below), whose sum is σ = 170280036. Its totient is φ = 96769920.

The previous prime is 131043427. The next prime is 131043467. The reversal of 131043445 is 544340131.

It can be written as a sum of positive squares in 6 ways, for example, as 55457809 + 75585636 = 7447^2 + 8694^2 .

It is not a de Polignac number, because 131043445 - 2⁵ = 131043413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76696 + ... + 78385.

It is an arithmetic number, because the mean of its divisors is an integer number (14190003).

Almost surely, 2^131043445 is an apocalyptic number.

It is an amenable number.

131043445 is a deficient number, since it is larger than the sum of its proper divisors (39236591).

131043445 is a wasteful number, since it uses less digits than its factorization.

131043445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155112 (or 155099 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 131043445 is about 11447.4208885670. The cubic root of 131043445 is about 507.9314457370.

Adding to 131043445 its reverse (544340131), we get a palindrome (675383576).

The spelling of 131043445 in words is "one hundred thirty-one million, forty-three thousand, four hundred forty-five".