133241831 has 4 divisors (see below), whose sum is σ = 133839552. Its totient is φ = 132644112.

The previous prime is 133241827. The next prime is 133241839. The reversal of 133241831 is 138142331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138142331 = 19 ⋅7270649.

It is a cyclic number.

It is not a de Polignac number, because 133241831 - 2² = 133241827 is a prime.

It is a super-2 number, since 2×133241831² = 35506771056465122, which contains 22 as substring.

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 133241831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133241839) 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, 298526 + ... + 298971.

It is an arithmetic number, because the mean of its divisors is an integer number (33459888).

Almost surely, 2^133241831 is an apocalyptic number.

133241831 is a deficient number, since it is larger than the sum of its proper divisors (597721).

133241831 is an equidigital number, since it uses as much as digits as its factorization.

133241831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597720.

The product of its digits is 1728, while the sum is 26.

The square root of 133241831 is about 11543.0425365239. The cubic root of 133241831 is about 510.7560630167.

The spelling of 133241831 in words is "one hundred thirty-three million, two hundred forty-one thousand, eight hundred thirty-one".