131516533 has 4 divisors (see below), whose sum is σ = 132520608. Its totient is φ = 130512460.

The previous prime is 131516531. The next prime is 131516543. The reversal of 131516533 is 335615131.

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.

It is a cyclic number.

It is not a de Polignac number, because 131516533 - 2¹ = 131516531 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 (131516531) 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, 501841 + ... + 502102.

It is an arithmetic number, because the mean of its divisors is an integer number (33130152).

Almost surely, 2^131516533 is an apocalyptic number.

It is an amenable number.

131516533 is a deficient number, since it is larger than the sum of its proper divisors (1004075).

131516533 is a wasteful number, since it uses less digits than its factorization.

131516533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004074.

The product of its digits is 4050, while the sum is 28.

The square root of 131516533 is about 11468.0657915797. The cubic root of 131516533 is about 508.5419498359.

The spelling of 131516533 in words is "one hundred thirty-one million, five hundred sixteen thousand, five hundred thirty-three".