133523351 has 24 divisors (see below), whose sum is σ = 149503680. Its totient is φ = 119149056.

The previous prime is 133523339. The next prime is 133523353. The reversal of 133523351 is 153325331.

It is not a de Polignac number, because 133523351 - 2¹⁸ = 133261207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133523351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133523353) 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 23 ways as a sum of consecutive naturals, for example, 974555 + ... + 974691.

It is an arithmetic number, because the mean of its divisors is an integer number (6229320).

Almost surely, 2^133523351 is an apocalyptic number.

133523351 is a deficient number, since it is larger than the sum of its proper divisors (15980329).

133523351 is a wasteful number, since it uses less digits than its factorization.

133523351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 302 counting only the distinct ones).

The product of its digits is 4050, while the sum is 26.

The square root of 133523351 is about 11555.2304607048. The cubic root of 133523351 is about 511.1155269502.

Adding to 133523351 its reverse (153325331), we get a palindrome (286848682).

The spelling of 133523351 in words is "one hundred thirty-three million, five hundred twenty-three thousand, three hundred fifty-one".