133234531 has 4 divisors (see below), whose sum is σ = 133258752. Its totient is φ = 133210312.

The previous prime is 133234529. The next prime is 133234583. The reversal of 133234531 is 135432331.

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 133234531 - 2¹ = 133234529 is a prime.

It is a super-2 number, since 2×133234531² = 35502880501579922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133234496 and 133234505.

It is not an unprimeable number, because it can be changed into a prime (133234501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561 + ... + 16333.

It is an arithmetic number, because the mean of its divisors is an integer number (33314688).

Almost surely, 2^133234531 is an apocalyptic number.

133234531 is a deficient number, since it is larger than the sum of its proper divisors (24221).

133234531 is an equidigital number, since it uses as much as digits as its factorization.

133234531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24220.

The product of its digits is 3240, while the sum is 25.

The square root of 133234531 is about 11542.7263244001. The cubic root of 133234531 is about 510.7467351469.

Adding to 133234531 its reverse (135432331), we get a palindrome (268666862).

The spelling of 133234531 in words is "one hundred thirty-three million, two hundred thirty-four thousand, five hundred thirty-one".