133045541 has 2 divisors, whose sum is σ = 133045542. Its totient is φ = 133045540.

The previous prime is 133045537. The next prime is 133045571. The reversal of 133045541 is 145540331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106523041 + 26522500 = 10321^2 + 5150^2 .

It is an emirp because it is prime and its reverse (145540331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133045541 - 2² = 133045537 is a prime.

It is a super-2 number, since 2×133045541² = 35402231959965362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133045541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133045571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66522770 + 66522771.

It is an arithmetic number, because the mean of its divisors is an integer number (66522771).

Almost surely, 2^133045541 is an apocalyptic number.

It is an amenable number.

133045541 is a deficient number, since it is larger than the sum of its proper divisors (1).

133045541 is an equidigital number, since it uses as much as digits as its factorization.

133045541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 133045541 is about 11534.5368784360. The cubic root of 133045541 is about 510.5051268574.

Adding to 133045541 its reverse (145540331), we get a palindrome (278585872).

The spelling of 133045541 in words is "one hundred thirty-three million, forty-five thousand, five hundred forty-one".