133006531 has 6 divisors (see below), whose sum is σ = 154721940. Its totient is φ = 114005556.

The previous prime is 133006519. The next prime is 133006541. The reversal of 133006531 is 135600331.

It is not a de Polignac number, because 133006531 - 2⁹ = 133006019 is a prime.

It is a super-2 number, since 2×133006531² = 35381474577307922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133006541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1357161 + ... + 1357258.

It is an arithmetic number, because the mean of its divisors is an integer number (25786990).

Almost surely, 2^133006531 is an apocalyptic number.

133006531 is a deficient number, since it is larger than the sum of its proper divisors (21715409).

133006531 is an equidigital number, since it uses as much as digits as its factorization.

133006531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714433 (or 2714426 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 22.

The square root of 133006531 is about 11532.8457459553. The cubic root of 133006531 is about 510.4552272727.

Adding to 133006531 its reverse (135600331), we get a palindrome (268606862).

The spelling of 133006531 in words is "one hundred thirty-three million, six thousand, five hundred thirty-one".