133215311 has 2 divisors, whose sum is σ = 133215312. Its totient is φ = 133215310.

The previous prime is 133215307. The next prime is 133215317. The reversal of 133215311 is 113512331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133215311 - 2² = 133215307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133215317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66607655 + 66607656.

It is an arithmetic number, because the mean of its divisors is an integer number (66607656).

Almost surely, 2^133215311 is an apocalyptic number.

133215311 is a deficient number, since it is larger than the sum of its proper divisors (1).

133215311 is an equidigital number, since it uses as much as digits as its factorization.

133215311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 20.

The square root of 133215311 is about 11541.8937354318. The cubic root of 133215311 is about 510.7221743862.

Adding to 133215311 its reverse (113512331), we get a palindrome (246727642).

The spelling of 133215311 in words is "one hundred thirty-three million, two hundred fifteen thousand, three hundred eleven".