133000031 has 4 divisors (see below), whose sum is σ = 133130064. Its totient is φ = 132870000.

The previous prime is 133000009. The next prime is 133000033. The reversal of 133000031 is 130000331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130000331 = 173 ⋅751447.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133000031 is a prime.

It is a super-2 number, since 2×133000031² = 35378016492001922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132999976 and 133000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133000033) 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, 63470 + ... + 65531.

It is an arithmetic number, because the mean of its divisors is an integer number (33282516).

Almost surely, 2^133000031 is an apocalyptic number.

133000031 is a deficient number, since it is larger than the sum of its proper divisors (130033).

133000031 is a wasteful number, since it uses less digits than its factorization.

133000031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130032.

The product of its (nonzero) digits is 27, while the sum is 11.

The square root of 133000031 is about 11532.5639386912. The cubic root of 133000031 is about 510.4469118589.

Adding to 133000031 its reverse (130000331), we get a palindrome (263000362).

The spelling of 133000031 in words is "one hundred thirty-three million, thirty-one", and thus it is an aban number.