133551131511 has 24 divisors (see below), whose sum is σ = 208591176832. Its totient is φ = 74453572800.

The previous prime is 133551131503. The next prime is 133551131513. The reversal of 133551131511 is 115131155331.

It is not a de Polignac number, because 133551131511 - 2³ = 133551131503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133551131513) 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, 1856305 + ... + 1926906.

Almost surely, 2^133551131511 is an apocalyptic number.

133551131511 is a deficient number, since it is larger than the sum of its proper divisors (75040045321).

133551131511 is an equidigital number, since it uses as much as digits as its factorization.

133551131511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783303 (or 3783262 counting only the distinct ones).

The product of its digits is 3375, while the sum is 30.

Adding to 133551131511 its reverse (115131155331), we get a palindrome (248682286842).

The spelling of 133551131511 in words is "one hundred thirty-three billion, five hundred fifty-one million, one hundred thirty-one thousand, five hundred eleven".