131721532 has 6 divisors (see below), whose sum is σ = 230512688. Its totient is φ = 65860764.

The previous prime is 131721521. The next prime is 131721539. The reversal of 131721532 is 235127131.

It is a happy number.

131721532 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 131721497 and 131721506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131721539) 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 as a sum of consecutive naturals, namely, 16465188 + ... + 16465195.

Almost surely, 2^131721532 is an apocalyptic number.

It is an amenable number.

131721532 is a deficient number, since it is larger than the sum of its proper divisors (98791156).

131721532 is a wasteful number, since it uses less digits than its factorization.

131721532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32930387 (or 32930385 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 131721532 is about 11477.0001306962. Note that the first 3 decimals coincide. The cubic root of 131721532 is about 508.8060395018.

Adding to 131721532 its reverse (235127131), we get a palindrome (366848663).

The spelling of 131721532 in words is "one hundred thirty-one million, seven hundred twenty-one thousand, five hundred thirty-two".