136436531 has 24 divisors (see below), whose sum is σ = 173968560. Its totient is φ = 105806400.

The previous prime is 136436491. The next prime is 136436537. The reversal of 136436531 is 135634631.

It is not a de Polignac number, because 136436531 - 2⁶ = 136436467 is a prime.

It is a super-2 number, since 2×136436531² = 37229853982627922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136436537) 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 in 23 ways as a sum of consecutive naturals, for example, 144521 + ... + 145461.

It is an arithmetic number, because the mean of its divisors is an integer number (7248690).

Almost surely, 2^136436531 is an apocalyptic number.

136436531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136436531 is a deficient number, since it is larger than the sum of its proper divisors (37532029).

136436531 is a wasteful number, since it uses less digits than its factorization.

136436531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1228 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 136436531 is about 11680.6049072811. The cubic root of 136436531 is about 514.8059481932.

The spelling of 136436531 in words is "one hundred thirty-six million, four hundred thirty-six thousand, five hundred thirty-one".