133530513 has 4 divisors (see below), whose sum is σ = 178040688. Its totient is φ = 89020340.

The previous prime is 133530503. The next prime is 133530533. The reversal of 133530513 is 315035331.

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 133530513 - 2⁴ = 133530497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133530503) 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, 22255083 + ... + 22255088.

It is an arithmetic number, because the mean of its divisors is an integer number (44510172).

Almost surely, 2^133530513 is an apocalyptic number.

It is an amenable number.

133530513 is a deficient number, since it is larger than the sum of its proper divisors (44510175).

133530513 is an equidigital number, since it uses as much as digits as its factorization.

133530513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44510174.

The product of its (nonzero) digits is 2025, while the sum is 24.

The square root of 133530513 is about 11555.5403594986. The cubic root of 133530513 is about 511.1246652868.

Adding to 133530513 its reverse (315035331), we get a palindrome (448565844).

The spelling of 133530513 in words is "one hundred thirty-three million, five hundred thirty thousand, five hundred thirteen".