133520051 has 12 divisors (see below), whose sum is σ = 155555280. Its totient is φ = 114271920.

The previous prime is 133520039. The next prime is 133520137. The reversal of 133520051 is 150025331.

It is not a de Polignac number, because 133520051 - 2⁶ = 133519987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133520021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38570 + ... + 41888.

It is an arithmetic number, because the mean of its divisors is an integer number (12962940).

Almost surely, 2^133520051 is an apocalyptic number.

133520051 is a deficient number, since it is larger than the sum of its proper divisors (22035229).

133520051 is an equidigital number, since it uses as much as digits as its factorization.

133520051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154 (or 4147 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 133520051 is about 11555.0876673438. The cubic root of 133520051 is about 511.1113162132. Note that the first 3 decimals are identical.

Adding to 133520051 its reverse (150025331), we get a palindrome (283545382).

The spelling of 133520051 in words is "one hundred thirty-three million, five hundred twenty thousand, fifty-one".