134312213 has 4 divisors (see below), whose sum is σ = 153499680. Its totient is φ = 115124748.

The previous prime is 134312209. The next prime is 134312219. The reversal of 134312213 is 312213431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 134312213 - 2² = 134312209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134312219) 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, 9593723 + ... + 9593736.

It is an arithmetic number, because the mean of its divisors is an integer number (38374920).

Almost surely, 2^134312213 is an apocalyptic number.

It is an amenable number.

134312213 is a deficient number, since it is larger than the sum of its proper divisors (19187467).

134312213 is an equidigital number, since it uses as much as digits as its factorization.

134312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19187466.

The product of its digits is 432, while the sum is 20.

The square root of 134312213 is about 11589.3146044104. The cubic root of 134312213 is about 512.1201157089.

Adding to 134312213 its reverse (312213431), we get a palindrome (446525644).

The spelling of 134312213 in words is "one hundred thirty-four million, three hundred twelve thousand, two hundred thirteen".