65131 has 8 divisors (see below), whose sum is σ = 73728. Its totient is φ = 57000.

The previous prime is 65129. The next prime is 65141. The reversal of 65131 is 13156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65131 - 2¹ = 65129 is a prime.

It is a super-2 number, since 2×65131² = 8484094322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 436.

It is an arithmetic number, because the mean of its divisors is an integer number (9216).

2⁶⁵¹³¹ is an apocalyptic number.

65131 is a deficient number, since it is larger than the sum of its proper divisors (8597).

65131 is a wasteful number, since it uses less digits than its factorization.

65131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 90, while the sum is 16.

The square root of 65131 is about 255.2077585028. The cubic root of 65131 is about 40.2342504898.

Adding to 65131 its reverse (13156), we get a palindrome (78287).

It can be divided in two parts, 65 and 131, that multiplied together give a triangular number (8515 = T₁₃₀).

The spelling of 65131 in words is "sixty-five thousand, one hundred thirty-one".