131321732 has 24 divisors (see below), whose sum is σ = 236734680. Its totient is φ = 63694080.

The previous prime is 131321717. The next prime is 131321747. The reversal of 131321732 is 237123131.

It is an interprime number because it is at equal distance from previous prime (131321717) and next prime (131321747).

It can be written as a sum of positive squares in 4 ways, for example, as 33825856 + 97495876 = 5816^2 + 9874^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131321698 and 131321707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56432 + ... + 58712.

It is an arithmetic number, because the mean of its divisors is an integer number (9863945).

Almost surely, 2^131321732 is an apocalyptic number.

It is an amenable number.

131321732 is a deficient number, since it is larger than the sum of its proper divisors (105412948).

131321732 is a wasteful number, since it uses less digits than its factorization.

131321732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711 (or 2709 counting only the distinct ones).

The product of its digits is 756, while the sum is 23.

The square root of 131321732 is about 11459.5694509000. The cubic root of 131321732 is about 508.2907433158.

Adding to 131321732 its reverse (237123131), we get a palindrome (368444863).

The spelling of 131321732 in words is "one hundred thirty-one million, three hundred twenty-one thousand, seven hundred thirty-two".