133747108531 has 4 divisors (see below), whose sum is σ = 133748514792. Its totient is φ = 133745702272.

The previous prime is 133747108447. The next prime is 133747108619. The reversal of 133747108531 is 135801747331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135801747331 = 23 ⋅5904423797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133747108531 is a prime.

It is a super-2 number, since 2×133747108531² (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 (133747103531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549241 + ... + 754426.

It is an arithmetic number, because the mean of its divisors is an integer number (33437128698).

Almost surely, 2^133747108531 is an apocalyptic number.

133747108531 is a deficient number, since it is larger than the sum of its proper divisors (1406261).

133747108531 is a wasteful number, since it uses less digits than its factorization.

133747108531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406260.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 133747108531 in words is "one hundred thirty-three billion, seven hundred forty-seven million, one hundred eight thousand, five hundred thirty-one".