136252531 has 2 divisors, whose sum is σ = 136252532. Its totient is φ = 136252530.

The previous prime is 136252511. The next prime is 136252541. The reversal of 136252531 is 135252631.

It is a strong prime.

It is an emirp because it is prime and its reverse (135252631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136252531 - 2⁵ = 136252499 is a prime.

It is a super-2 number, since 2×136252531² = 37129504407811922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136252531.

It is not a weakly prime, because it can be changed into another prime (136252511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68126265 + 68126266.

It is an arithmetic number, because the mean of its divisors is an integer number (68126266).

Almost surely, 2^136252531 is an apocalyptic number.

136252531 is a deficient number, since it is larger than the sum of its proper divisors (1).

136252531 is an equidigital number, since it uses as much as digits as its factorization.

136252531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 136252531 is about 11672.7259455536. The cubic root of 136252531 is about 514.5744195163.

The spelling of 136252531 in words is "one hundred thirty-six million, two hundred fifty-two thousand, five hundred thirty-one".