131506032 has 40 divisors (see below), whose sum is σ = 388256896. Its totient is φ = 37573056.

The previous prime is 131506031. The next prime is 131506043. The reversal of 131506032 is 230605131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131506031) 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, 195358 + ... + 196029.

Almost surely, 2^131506032 is an apocalyptic number.

131506032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131506032 is an abundant number, since it is smaller than the sum of its proper divisors (256750864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131506032 is a wasteful number, since it uses less digits than its factorization.

131506032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391405 (or 391399 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131506032 is about 11467.6079458621. The cubic root of 131506032 is about 508.5284145512.

Subtracting 131506032 from its reverse (230605131), we obtain a palindrome (99099099).

The spelling of 131506032 in words is "one hundred thirty-one million, five hundred six thousand, thirty-two".