133321541 has 4 divisors (see below), whose sum is σ = 133406112. Its totient is φ = 133236972.

The previous prime is 133321519. The next prime is 133321561. The reversal of 133321541 is 145123331.

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 133321541 - 2⁶ = 133321477 is a prime.

It is a super-2 number, since 2×133321541² = 35549266589229362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133321561) 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, 39875 + ... + 43088.

It is an arithmetic number, because the mean of its divisors is an integer number (33351528).

Almost surely, 2^133321541 is an apocalyptic number.

It is an amenable number.

133321541 is a deficient number, since it is larger than the sum of its proper divisors (84571).

133321541 is an equidigital number, since it uses as much as digits as its factorization.

133321541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84570.

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

The square root of 133321541 is about 11546.4947494900. The cubic root of 133321541 is about 510.8578935246.

Adding to 133321541 its reverse (145123331), we get a palindrome (278444872).

The spelling of 133321541 in words is "one hundred thirty-three million, three hundred twenty-one thousand, five hundred forty-one".