133455213 has 6 divisors (see below), whose sum is σ = 192768654. Its totient is φ = 88970136.

The previous prime is 133455199. The next prime is 133455241. The reversal of 133455213 is 312554331.

133455213 is a `hidden beast` number, since 133 + 4 + 5 + 521 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 132779529 + 675684 = 11523^2 + 822^2 .

It is not a de Polignac number, because 133455213 - 2⁸ = 133454957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133455313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7414170 + ... + 7414187.

It is an arithmetic number, because the mean of its divisors is an integer number (32128109).

Almost surely, 2^133455213 is an apocalyptic number.

It is an amenable number.

133455213 is a deficient number, since it is larger than the sum of its proper divisors (59313441).

133455213 is a wasteful number, since it uses less digits than its factorization.

133455213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14828363 (or 14828360 counting only the distinct ones).

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

The square root of 133455213 is about 11552.2817226728. The cubic root of 133455213 is about 511.0285700865.

The spelling of 133455213 in words is "one hundred thirty-three million, four hundred fifty-five thousand, two hundred thirteen".