131464565 has 16 divisors (see below), whose sum is σ = 159938688. Its totient is φ = 103726656.

The previous prime is 131464561. The next prime is 131464639. The reversal of 131464565 is 565464131.

It is a cyclic number.

It is not a de Polignac number, because 131464565 - 2² = 131464561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131464561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204134 + ... + 204776.

It is an arithmetic number, because the mean of its divisors is an integer number (9996168).

Almost surely, 2^131464565 is an apocalyptic number.

It is an amenable number.

131464565 is a deficient number, since it is larger than the sum of its proper divisors (28474123).

131464565 is a wasteful number, since it uses less digits than its factorization.

131464565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 43200, while the sum is 35.

The square root of 131464565 is about 11465.7997976591. The cubic root of 131464565 is about 508.4749585379.

It can be divided in two parts, 13146 and 4565, that multiplied together give a triangular number (60011490 = T₁₀₉₅₅).

The spelling of 131464565 in words is "one hundred thirty-one million, four hundred sixty-four thousand, five hundred sixty-five".