131780345 has 16 divisors (see below), whose sum is σ = 169464960. Its totient is φ = 98022144.

The previous prime is 131780323. The next prime is 131780351. The reversal of 131780345 is 543087131.

It is a cyclic number.

It is not a de Polignac number, because 131780345 - 2⁶ = 131780281 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2285 + ... + 16394.

It is an arithmetic number, because the mean of its divisors is an integer number (10591560).

Almost surely, 2^131780345 is an apocalyptic number.

It is an amenable number.

131780345 is a deficient number, since it is larger than the sum of its proper divisors (37684615).

131780345 is a wasteful number, since it uses less digits than its factorization.

131780345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 131780345 is about 11479.5620561065. The cubic root of 131780345 is about 508.8817546780.

The spelling of 131780345 in words is "one hundred thirty-one million, seven hundred eighty thousand, three hundred forty-five".