131535251 has 2 divisors, whose sum is σ = 131535252. Its totient is φ = 131535250.

The previous prime is 131535247. The next prime is 131535253. The reversal of 131535251 is 152535131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131535251 - 2² = 131535247 is a prime.

It is a Sophie Germain prime.

Together with 131535253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131535251.

It is not a weakly prime, because it can be changed into another prime (131535253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65767625 + 65767626.

It is an arithmetic number, because the mean of its divisors is an integer number (65767626).

Almost surely, 2^131535251 is an apocalyptic number.

131535251 is a deficient number, since it is larger than the sum of its proper divisors (1).

131535251 is an equidigital number, since it uses as much as digits as its factorization.

131535251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 26.

The square root of 131535251 is about 11468.8818548279. The cubic root of 131535251 is about 508.5660746524.

The spelling of 131535251 in words is "one hundred thirty-one million, five hundred thirty-five thousand, two hundred fifty-one".