133131541 has 2 divisors, whose sum is σ = 133131542. Its totient is φ = 133131540.

The previous prime is 133131527. The next prime is 133131563. The reversal of 133131541 is 145131331.

It is an a-pointer prime, because the next prime (133131563) can be obtained adding 133131541 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122102500 + 11029041 = 11050^2 + 3321^2 .

It is a cyclic number.

It is not a de Polignac number, because 133131541 - 2⁷ = 133131413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133131571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66565770 + 66565771.

It is an arithmetic number, because the mean of its divisors is an integer number (66565771).

Almost surely, 2^133131541 is an apocalyptic number.

It is an amenable number.

133131541 is a deficient number, since it is larger than the sum of its proper divisors (1).

133131541 is an equidigital number, since it uses as much as digits as its factorization.

133131541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 133131541 is about 11538.2642108768. The cubic root of 133131541 is about 510.6150991879.

Adding to 133131541 its reverse (145131331), we get a palindrome (278262872).

The spelling of 133131541 in words is "one hundred thirty-three million, one hundred thirty-one thousand, five hundred forty-one".