133506056831 has 16 divisors (see below), whose sum is σ = 154111776000. Its totient is φ = 113288364288.

The previous prime is 133506056819. The next prime is 133506056839. The reversal of 133506056831 is 138650605331.

It is a cyclic number.

It is not a de Polignac number, because 133506056831 - 2³⁰ = 132432315007 is a prime.

It is a super-2 number, since 2×133506056831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133506056839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149120 + ... + 537818.

It is an arithmetic number, because the mean of its divisors is an integer number (9631986000).

Almost surely, 2^133506056831 is an apocalyptic number.

133506056831 is a deficient number, since it is larger than the sum of its proper divisors (20605719169).

133506056831 is a wasteful number, since it uses less digits than its factorization.

133506056831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389198.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 133506056831 in words is "one hundred thirty-three billion, five hundred six million, fifty-six thousand, eight hundred thirty-one".