131144635 has 4 divisors (see below), whose sum is σ = 157373568. Its totient is φ = 104915704.

The previous prime is 131144633. The next prime is 131144653. The reversal of 131144635 is 536441131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 536441131 = 1237 ⋅433663.

It is a cyclic number.

It is not a de Polignac number, because 131144635 - 2¹ = 131144633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131144633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13114459 + ... + 13114468.

It is an arithmetic number, because the mean of its divisors is an integer number (39343392).

Almost surely, 2^131144635 is an apocalyptic number.

131144635 is a deficient number, since it is larger than the sum of its proper divisors (26228933).

131144635 is an equidigital number, since it uses as much as digits as its factorization.

131144635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26228932.

The product of its digits is 4320, while the sum is 28.

The square root of 131144635 is about 11451.8398085199. The cubic root of 131144635 is about 508.0621513951.

Adding to 131144635 its reverse (536441131), we get a palindrome (667585766).

The spelling of 131144635 in words is "one hundred thirty-one million, one hundred forty-four thousand, six hundred thirty-five".