133230542681 has 4 divisors (see below), whose sum is σ = 134203028532. Its totient is φ = 132258056832.

The previous prime is 133230542629. The next prime is 133230542719. The reversal of 133230542681 is 186245032331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186245032331 = 251 ⋅742012081.

It can be written as a sum of positive squares in 2 ways, for example, as 93513640000 + 39716902681 = 305800^2 + 199291^2 .

It is a cyclic number.

It is not a de Polignac number, because 133230542681 - 2⁶ = 133230542617 is a prime.

It is a super-2 number, since 2×133230542681² (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 (133230542611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486242720 + ... + 486242993.

It is an arithmetic number, because the mean of its divisors is an integer number (33550757133).

Almost surely, 2^133230542681 is an apocalyptic number.

It is an amenable number.

133230542681 is a deficient number, since it is larger than the sum of its proper divisors (972485851).

133230542681 is an equidigital number, since it uses as much as digits as its factorization.

133230542681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972485850.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 133230542681 in words is "one hundred thirty-three billion, two hundred thirty million, five hundred forty-two thousand, six hundred eighty-one".