133345215 has 24 divisors (see below), whose sum is σ = 231688080. Its totient is φ = 70946304.

The previous prime is 133345213. The next prime is 133345253. The reversal of 133345215 is 512543331.

133345215 is a `hidden beast` number, since 133 + 3 + 4 + 521 + 5 = 666.

It is not a de Polignac number, because 133345215 - 2¹ = 133345213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133345213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16591 + ... + 23279.

It is an arithmetic number, because the mean of its divisors is an integer number (9653670).

Almost surely, 2^133345215 is an apocalyptic number.

133345215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133345215 is a deficient number, since it is larger than the sum of its proper divisors (98342865).

133345215 is a wasteful number, since it uses less digits than its factorization.

133345215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143 (or 7140 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 133345215 is about 11547.5198635898. The cubic root of 133345215 is about 510.8881295337. Note that the first 3 decimals are identical.

Adding to 133345215 its reverse (512543331), we get a palindrome (645888546).

The spelling of 133345215 in words is "one hundred thirty-three million, three hundred forty-five thousand, two hundred fifteen".