135542213 has 8 divisors (see below), whose sum is σ = 136722936. Its totient is φ = 134366400.

The previous prime is 135542167. The next prime is 135542221. The reversal of 135542213 is 312245531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 134142724 = 1183^2 + 11582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135542213 - 2⁸ = 135541957 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 (135542233) 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 7 ways as a sum of consecutive naturals, for example, 71903 + ... + 73763.

It is an arithmetic number, because the mean of its divisors is an integer number (17090367).

Almost surely, 2^135542213 is an apocalyptic number.

It is an amenable number.

135542213 is a deficient number, since it is larger than the sum of its proper divisors (1180723).

135542213 is a wasteful number, since it uses less digits than its factorization.

135542213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455.

The product of its digits is 3600, while the sum is 26.

The square root of 135542213 is about 11642.2597892334. The cubic root of 135542213 is about 513.6786600444.

Adding to 135542213 its reverse (312245531), we get a palindrome (447787744).

The spelling of 135542213 in words is "one hundred thirty-five million, five hundred forty-two thousand, two hundred thirteen".