131609252 has 6 divisors (see below), whose sum is σ = 230316198. Its totient is φ = 65804624.

The previous prime is 131609237. The next prime is 131609273. The reversal of 131609252 is 252906131.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 12013156 = 10936^2 + 3466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16451153 + ... + 16451160.

It is an arithmetic number, because the mean of its divisors is an integer number (38386033).

Almost surely, 2^131609252 is an apocalyptic number.

It is an amenable number.

131609252 is a deficient number, since it is larger than the sum of its proper divisors (98706946).

131609252 is a wasteful number, since it uses less digits than its factorization.

131609252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32902317 (or 32902315 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 131609252 is about 11472.1075657440. The cubic root of 131609252 is about 508.6614289202.

The spelling of 131609252 in words is "one hundred thirty-one million, six hundred nine thousand, two hundred fifty-two".