136431205 has 16 divisors (see below), whose sum is σ = 173746944. Its totient is φ = 102488320.

The previous prime is 136431203. The next prime is 136431221. The reversal of 136431205 is 502134631.

It is not a de Polignac number, because 136431205 - 2¹ = 136431203 is a prime.

It is a super-2 number, since 2×136431205² = 37226947395504050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136431203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41160 + ... + 44350.

It is an arithmetic number, because the mean of its divisors is an integer number (10859184).

Almost surely, 2^136431205 is an apocalyptic number.

It is an amenable number.

136431205 is a deficient number, since it is larger than the sum of its proper divisors (37315739).

136431205 is a wasteful number, since it uses less digits than its factorization.

136431205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 136431205 is about 11680.3769202881. The cubic root of 136431205 is about 514.7992493711.

Adding to 136431205 its reverse (502134631), we get a palindrome (638565836).

The spelling of 136431205 in words is "one hundred thirty-six million, four hundred thirty-one thousand, two hundred five".