135207213 has 16 divisors (see below), whose sum is σ = 191126016. Its totient is φ = 84870720.

The previous prime is 135207209. The next prime is 135207221. The reversal of 135207213 is 312702531.

It is not a de Polignac number, because 135207213 - 2² = 135207209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135207223) 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, 16206 + ... + 23087.

It is an arithmetic number, because the mean of its divisors is an integer number (11945376).

Almost surely, 2^135207213 is an apocalyptic number.

It is an amenable number.

135207213 is a deficient number, since it is larger than the sum of its proper divisors (55918803).

135207213 is a wasteful number, since it uses less digits than its factorization.

135207213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39364.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 135207213 is about 11627.8636472914. The cubic root of 135207213 is about 513.2551159380.

Adding to 135207213 its reverse (312702531), we get a palindrome (447909744).

The spelling of 135207213 in words is "one hundred thirty-five million, two hundred seven thousand, two hundred thirteen".