131284136 has 8 divisors (see below), whose sum is σ = 246157770. Its totient is φ = 65642064.

The previous prime is 131284121. The next prime is 131284141. The reversal of 131284136 is 631482131.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 59136100 = 8494^2 + 7690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 131284099 and 131284108.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8205251 + ... + 8205266.

Almost surely, 2^131284136 is an apocalyptic number.

It is an amenable number.

131284136 is a deficient number, since it is larger than the sum of its proper divisors (114873634).

131284136 is a wasteful number, since it uses less digits than its factorization.

131284136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16410523 (or 16410519 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 131284136 is about 11457.9289577131. The cubic root of 131284136 is about 508.2422326278.

The spelling of 131284136 in words is "one hundred thirty-one million, two hundred eighty-four thousand, one hundred thirty-six".