133815229 has 4 divisors (see below), whose sum is σ = 133841376. Its totient is φ = 133789084.

The previous prime is 133815223. The next prime is 133815257. The reversal of 133815229 is 922518331.

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 133815229 - 2⁹ = 133814717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133815194 and 133815203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133815223) 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, 2599 + ... + 16564.

It is an arithmetic number, because the mean of its divisors is an integer number (33460344).

It is a 5118-hyperperfect number.

Almost surely, 2^133815229 is an apocalyptic number.

It is an amenable number.

133815229 is a deficient number, since it is larger than the sum of its proper divisors (26147).

133815229 is an equidigital number, since it uses as much as digits as its factorization.

133815229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26146.

The product of its digits is 12960, while the sum is 34.

The square root of 133815229 is about 11567.8532580596. The cubic root of 133815229 is about 511.4876835931.

The spelling of 133815229 in words is "one hundred thirty-three million, eight hundred fifteen thousand, two hundred twenty-nine".