131235306 has 16 divisors (see below), whose sum is σ = 265420800. Its totient is φ = 43253408.

The previous prime is 131235289. The next prime is 131235329. The reversal of 131235306 is 603532131.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122346 + ... + 123413.

It is an arithmetic number, because the mean of its divisors is an integer number (16588800).

Almost surely, 2^131235306 is an apocalyptic number.

131235306 is an abundant number, since it is smaller than the sum of its proper divisors (134185494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131235306 is a wasteful number, since it uses less digits than its factorization.

131235306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245853.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 131235306 is about 11455.7979207037. The cubic root of 131235306 is about 508.1792127116.

Adding to 131235306 its reverse (603532131), we get a palindrome (734767437).

The spelling of 131235306 in words is "one hundred thirty-one million, two hundred thirty-five thousand, three hundred six".