131531133 has 8 divisors (see below), whose sum is σ = 175435200. Its totient is φ = 87657248.

The previous prime is 131531093. The next prime is 131531143. The reversal of 131531133 is 331135131.

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 131531133 - 2¹² = 131527037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131531143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6208 + ... + 17366.

It is an arithmetic number, because the mean of its divisors is an integer number (21929400).

Almost surely, 2^131531133 is an apocalyptic number.

It is an amenable number.

131531133 is a deficient number, since it is larger than the sum of its proper divisors (43904067).

131531133 is a wasteful number, since it uses less digits than its factorization.

131531133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15091.

The product of its digits is 405, while the sum is 21.

The square root of 131531133 is about 11468.7023241516. The cubic root of 131531133 is about 508.5607673376.

Adding to 131531133 its reverse (331135131), we get a palindrome (462666264).

The spelling of 131531133 in words is "one hundred thirty-one million, five hundred thirty-one thousand, one hundred thirty-three".