133515241 has 2 divisors, whose sum is σ = 133515242. Its totient is φ = 133515240.

The previous prime is 133515163. The next prime is 133515247. The reversal of 133515241 is 142515331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132158016 + 1357225 = 11496^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 133515241 - 2¹⁵ = 133482473 is a prime.

It is not a weakly prime, because it can be changed into another prime (133515247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66757620 + 66757621.

It is an arithmetic number, because the mean of its divisors is an integer number (66757621).

Almost surely, 2^133515241 is an apocalyptic number.

It is an amenable number.

133515241 is a deficient number, since it is larger than the sum of its proper divisors (1).

133515241 is an equidigital number, since it uses as much as digits as its factorization.

133515241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 133515241 is about 11554.8795320419. The cubic root of 133515241 is about 511.1051786208.

The spelling of 133515241 in words is "one hundred thirty-three million, five hundred fifteen thousand, two hundred forty-one".