65544131 has 4 divisors (see below), whose sum is σ = 67315632. Its totient is φ = 63772632.

The previous prime is 65544119. The next prime is 65544191. The reversal of 65544131 is 13144556.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65544131 is a prime.

It is a super-2 number, since 2×65544131² = 8592066217090322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65544094 and 65544103.

It is not an unprimeable number, because it can be changed into a prime (65544191) 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, 885695 + ... + 885768.

It is an arithmetic number, because the mean of its divisors is an integer number (16828908).

Almost surely, 2^65544131 is an apocalyptic number.

65544131 is a deficient number, since it is larger than the sum of its proper divisors (1771501).

65544131 is a wasteful number, since it uses less digits than its factorization.

65544131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771500.

The product of its digits is 7200, while the sum is 29.

The square root of 65544131 is about 8095.9329913235. The cubic root of 65544131 is about 403.1914091344.

Adding to 65544131 its reverse (13144556), we get a palindrome (78688687).

The spelling of 65544131 in words is "sixty-five million, five hundred forty-four thousand, one hundred thirty-one".