135411213 has 16 divisors (see below), whose sum is σ = 207712256. Its totient is φ = 76863600.

The previous prime is 135411209. The next prime is 135411251. The reversal of 135411213 is 312114531.

It is not a de Polignac number, because 135411213 - 2² = 135411209 is a prime.

It is a super-2 number, since 2×135411213² = 36672393212262738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 135411213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135411013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18181 + ... + 24522.

It is an arithmetic number, because the mean of its divisors is an integer number (12982016).

Almost surely, 2^135411213 is an apocalyptic number.

It is an amenable number.

135411213 is a deficient number, since it is larger than the sum of its proper divisors (72301043).

135411213 is a wasteful number, since it uses less digits than its factorization.

135411213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42864.

The product of its digits is 360, while the sum is 21.

The square root of 135411213 is about 11636.6323736724. The cubic root of 135411213 is about 513.5131185166.

Adding to 135411213 its reverse (312114531), we get a palindrome (447525744).

The spelling of 135411213 in words is "one hundred thirty-five million, four hundred eleven thousand, two hundred thirteen".