131099533 has 4 divisors (see below), whose sum is σ = 132372448. Its totient is φ = 129826620.

The previous prime is 131099519. The next prime is 131099539. The reversal of 131099533 is 335990131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335990131 = 11279 ⋅29789.

It is a cyclic number.

It is not a de Polignac number, because 131099533 - 2²⁵ = 97545101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131099539) 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, 636303 + ... + 636508.

It is an arithmetic number, because the mean of its divisors is an integer number (33093112).

Almost surely, 2^131099533 is an apocalyptic number.

It is an amenable number.

131099533 is a deficient number, since it is larger than the sum of its proper divisors (1272915).

131099533 is a wasteful number, since it uses less digits than its factorization.

131099533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272914.

The product of its (nonzero) digits is 10935, while the sum is 34.

The square root of 131099533 is about 11449.8704359482. The cubic root of 131099533 is about 508.0039021028.

The spelling of 131099533 in words is "one hundred thirty-one million, ninety-nine thousand, five hundred thirty-three".