131144245 has 4 divisors (see below), whose sum is σ = 157373100. Its totient is φ = 104915392.

The previous prime is 131144201. The next prime is 131144261. The reversal of 131144245 is 542441131.

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 73034116 + 58110129 = 8546^2 + 7623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131144245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13114420 + ... + 13114429.

It is an arithmetic number, because the mean of its divisors is an integer number (39343275).

Almost surely, 2^131144245 is an apocalyptic number.

It is an amenable number.

131144245 is a deficient number, since it is larger than the sum of its proper divisors (26228855).

131144245 is an equidigital number, since it uses as much as digits as its factorization.

131144245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26228854.

The product of its digits is 1920, while the sum is 25.

The square root of 131144245 is about 11451.8227806756. The cubic root of 131144245 is about 508.0616477668.

Adding to 131144245 its reverse (542441131), we get a palindrome (673585376).

The spelling of 131144245 in words is "one hundred thirty-one million, one hundred forty-four thousand, two hundred forty-five".