133213541 has 8 divisors (see below), whose sum is σ = 144748800. Its totient is φ = 122130720.

The previous prime is 133213519. The next prime is 133213571. The reversal of 133213541 is 145312331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133213541 - 2¹⁴ = 133197157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133213511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112496 + ... + 113673.

It is an arithmetic number, because the mean of its divisors is an integer number (18093600).

Almost surely, 2^133213541 is an apocalyptic number.

It is an amenable number.

133213541 is a deficient number, since it is larger than the sum of its proper divisors (11535259).

133213541 is a wasteful number, since it uses less digits than its factorization.

133213541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226219.

The product of its digits is 1080, while the sum is 23.

The square root of 133213541 is about 11541.8170579853. The cubic root of 133213541 is about 510.7199124283.

Adding to 133213541 its reverse (145312331), we get a palindrome (278525872).

The spelling of 133213541 in words is "one hundred thirty-three million, two hundred thirteen thousand, five hundred forty-one".