131612545 has 8 divisors (see below), whose sum is σ = 158216040. Its totient is φ = 105102720.

The previous prime is 131612543. The next prime is 131612573. The reversal of 131612545 is 545216131.

It can be written as a sum of positive squares in 4 ways, for example, as 30569841 + 101042704 = 5529^2 + 10052^2 .

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

It is not a de Polignac number, because 131612545 - 2¹ = 131612543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131612543) 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, 20286 + ... + 25975.

It is an arithmetic number, because the mean of its divisors is an integer number (19777005).

Almost surely, 2^131612545 is an apocalyptic number.

It is an amenable number.

131612545 is a deficient number, since it is larger than the sum of its proper divisors (26603495).

131612545 is an equidigital number, since it uses as much as digits as its factorization.

131612545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46835.

The product of its digits is 3600, while the sum is 28.

The square root of 131612545 is about 11472.2510868617. The cubic root of 131612545 is about 508.6656712970.

Adding to 131612545 its reverse (545216131), we get a palindrome (676828676).

It can be divided in two parts, 1316 and 12545, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 131612545 in words is "one hundred thirty-one million, six hundred twelve thousand, five hundred forty-five".