131323145 has 8 divisors (see below), whose sum is σ = 158202504. Its totient is φ = 104648704.

The previous prime is 131323141. The next prime is 131323151. The reversal of 131323145 is 541323131.

It can be written as a sum of positive squares in 4 ways, for example, as 69039481 + 62283664 = 8309^2 + 7892^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131323145 - 2² = 131323141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131323145.

It is not an unprimeable number, because it can be changed into a prime (131323141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49814 + ... + 52383.

It is an arithmetic number, because the mean of its divisors is an integer number (19775313).

Almost surely, 2^131323145 is an apocalyptic number.

It is an amenable number.

131323145 is a deficient number, since it is larger than the sum of its proper divisors (26879359).

131323145 is a wasteful number, since it uses less digits than its factorization.

131323145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102459.

The product of its digits is 1080, while the sum is 23.

The square root of 131323145 is about 11459.6311022650. The cubic root of 131323145 is about 508.2925663506.

Adding to 131323145 its reverse (541323131), we get a palindrome (672646276).

The spelling of 131323145 in words is "one hundred thirty-one million, three hundred twenty-three thousand, one hundred forty-five".