131405251 has 2 divisors, whose sum is σ = 131405252. Its totient is φ = 131405250.

The previous prime is 131405227. The next prime is 131405297. The reversal of 131405251 is 152504131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131405251 - 2¹³ = 131397059 is a prime.

It is not a weakly prime, because it can be changed into another prime (131405201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65702625 + 65702626.

It is an arithmetic number, because the mean of its divisors is an integer number (65702626).

Almost surely, 2^131405251 is an apocalyptic number.

131405251 is a deficient number, since it is larger than the sum of its proper divisors (1).

131405251 is an equidigital number, since it uses as much as digits as its factorization.

131405251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 131405251 is about 11463.2129440223. The cubic root of 131405251 is about 508.3984760256.

Adding to 131405251 its reverse (152504131), we get a palindrome (283909382).

The spelling of 131405251 in words is "one hundred thirty-one million, four hundred five thousand, two hundred fifty-one".