133508252531 has 4 divisors (see below), whose sum is σ = 133585293072. Its totient is φ = 133431211992.

The previous prime is 133508252431. The next prime is 133508252543. The reversal of 133508252531 is 135252805331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133508252531 - 2¹⁰ = 133508251507 is a prime.

It is a super-2 number, since 2×133508252531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133508252431) 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, 38517671 + ... + 38521136.

It is an arithmetic number, because the mean of its divisors is an integer number (33396323268).

Almost surely, 2^133508252531 is an apocalyptic number.

133508252531 is a deficient number, since it is larger than the sum of its proper divisors (77040541).

133508252531 is an equidigital number, since it uses as much as digits as its factorization.

133508252531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77040540.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 133508252531 in words is "one hundred thirty-three billion, five hundred eight million, two hundred fifty-two thousand, five hundred thirty-one".