133012531 has 8 divisors (see below), whose sum is σ = 137728800. Its totient is φ = 128304960.

The previous prime is 133012489. The next prime is 133012541. The reversal of 133012531 is 135210331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133012531 - 2¹⁹ = 132488243 is a prime.

It is a super-2 number, since 2×133012531² = 35384666806051922, 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 = 133012499 and 133012508.

It is not an unprimeable number, because it can be changed into a prime (133012541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53271 + ... + 55711.

It is an arithmetic number, because the mean of its divisors is an integer number (17216100).

Almost surely, 2^133012531 is an apocalyptic number.

133012531 is a deficient number, since it is larger than the sum of its proper divisors (4716269).

133012531 is a wasteful number, since it uses less digits than its factorization.

133012531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 133012531 is about 11533.1058696259. The cubic root of 133012531 is about 510.4629027988.

Adding to 133012531 its reverse (135210331), we get a palindrome (268222862).

It can be divided in two parts, 1330 and 12531, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 133012531 in words is "one hundred thirty-three million, twelve thousand, five hundred thirty-one".