133130031 has 4 divisors (see below), whose sum is σ = 177506712. Its totient is φ = 88753352.

The previous prime is 133129987. The next prime is 133130047. The reversal of 133130031 is 130031331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133130031 - 2⁶ = 133129967 is a prime.

It is a super-2 number, since 2×133130031² = 35447210308121922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133130051) 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, 22188336 + ... + 22188341.

It is an arithmetic number, because the mean of its divisors is an integer number (44376678).

Almost surely, 2^133130031 is an apocalyptic number.

133130031 is a deficient number, since it is larger than the sum of its proper divisors (44376681).

133130031 is an equidigital number, since it uses as much as digits as its factorization.

133130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44376680.

The product of its (nonzero) digits is 81, while the sum is 15.

The square root of 133130031 is about 11538.1987762389. The cubic root of 133130031 is about 510.6131686870.

Adding to 133130031 its reverse (130031331), we get a palindrome (263161362).

It can be divided in two parts, 1331300 and 31, that added together give a palindrome (1331331).

The spelling of 133130031 in words is "one hundred thirty-three million, one hundred thirty thousand, thirty-one".