136543213 has 4 divisors (see below), whose sum is σ = 137895228. Its totient is φ = 135191200.

The previous prime is 136543171. The next prime is 136543229. The reversal of 136543213 is 312345631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85877289 + 50665924 = 9267^2 + 7118^2 .

It is a cyclic number.

It is not a de Polignac number, because 136543213 - 2²¹ = 134446061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136541213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675856 + ... + 676057.

It is an arithmetic number, because the mean of its divisors is an integer number (34473807).

Almost surely, 2^136543213 is an apocalyptic number.

It is an amenable number.

136543213 is a deficient number, since it is larger than the sum of its proper divisors (1352015).

136543213 is a wasteful number, since it uses less digits than its factorization.

136543213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352014.

The product of its digits is 6480, while the sum is 28.

The square root of 136543213 is about 11685.1706448815. The cubic root of 136543213 is about 514.9400916897.

Adding to 136543213 its reverse (312345631), we get a palindrome (448888844).

The spelling of 136543213 in words is "one hundred thirty-six million, five hundred forty-three thousand, two hundred thirteen".