64131 has 4 divisors (see below), whose sum is σ = 85512. Its totient is φ = 42752.

The previous prime is 64123. The next prime is 64151. The reversal of 64131 is 13146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64131 - 2³ = 64123 is a prime.

It is a super-2 number, since 2×64131² = 8225570322, which contains 22 as substring.

It is a D-number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 64131.

It is not an unprimeable number, because it can be changed into a prime (64151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10686 + ... + 10691.

It is an arithmetic number, because the mean of its divisors is an integer number (21378).

2⁶⁴¹³¹ is an apocalyptic number.

64131 is a deficient number, since it is larger than the sum of its proper divisors (21381).

64131 is a wasteful number, since it uses less digits than its factorization.

64131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21380.

The product of its digits is 72, while the sum is 15.

The square root of 64131 is about 253.2409919425. The cubic root of 64131 is about 40.0272730669.

Adding to 64131 its sum of digits (15), we get a palindrome (64146).

Adding to 64131 its reverse (13146), we get a palindrome (77277).

The spelling of 64131 in words is "sixty-four thousand, one hundred thirty-one".