131257332 has 18 divisors (see below), whose sum is σ = 331789458. Its totient is φ = 43752432.

The previous prime is 131257327. The next prime is 131257367. The reversal of 131257332 is 233752131.

It can be written as a sum of positive squares in only one way, i.e., 89189136 + 42068196 = 9444^2 + 6486^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 131257296 and 131257305.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1822983 + ... + 1823054.

Almost surely, 2^131257332 is an apocalyptic number.

131257332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131257332 is an abundant number, since it is smaller than the sum of its proper divisors (200532126).

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

131257332 is a wasteful number, since it uses less digits than its factorization.

131257332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646047 (or 3646042 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 131257332 is about 11456.7592276350. The cubic root of 131257332 is about 508.2076413653.

The spelling of 131257332 in words is "one hundred thirty-one million, two hundred fifty-seven thousand, three hundred thirty-two".