131645156 has 6 divisors (see below), whose sum is σ = 230379030. Its totient is φ = 65822576.

The previous prime is 131645153. The next prime is 131645159. The reversal of 131645156 is 651546131.

It is an interprime number because it is at equal distance from previous prime (131645153) and next prime (131645159).

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 36192256 = 9770^2 + 6016^2 .

It is not an unprimeable number, because it can be changed into a prime (131645153) 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, 16455641 + ... + 16455648.

It is an arithmetic number, because the mean of its divisors is an integer number (38396505).

Almost surely, 2^131645156 is an apocalyptic number.

It is an amenable number.

131645156 is a deficient number, since it is larger than the sum of its proper divisors (98733874).

131645156 is a wasteful number, since it uses less digits than its factorization.

131645156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32911293 (or 32911291 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 131645156 is about 11473.6722979175. The cubic root of 131645156 is about 508.7076802771.

The spelling of 131645156 in words is "one hundred thirty-one million, six hundred forty-five thousand, one hundred fifty-six".