131131045 has 4 divisors (see below), whose sum is σ = 157357260. Its totient is φ = 104904832.

The previous prime is 131131043. The next prime is 131131097. The reversal of 131131045 is 540131131.

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 67354849 + 63776196 = 8207^2 + 7986^2 .

It is a cyclic number.

It is not a de Polignac number, because 131131045 - 2¹ = 131131043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131131043) 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, 13113100 + ... + 13113109.

It is an arithmetic number, because the mean of its divisors is an integer number (39339315).

Almost surely, 2^131131045 is an apocalyptic number.

It is an amenable number.

131131045 is a deficient number, since it is larger than the sum of its proper divisors (26226215).

131131045 is an equidigital number, since it uses as much as digits as its factorization.

131131045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26226214.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 131131045 is about 11451.2464387070. The cubic root of 131131045 is about 508.0446012982.

Adding to 131131045 its reverse (540131131), we get a palindrome (671262176).

The spelling of 131131045 in words is "one hundred thirty-one million, one hundred thirty-one thousand, forty-five".