65131601 has 8 divisors (see below), whose sum is σ = 68807520. Its totient is φ = 61480512.

The previous prime is 65131579. The next prime is 65131621. The reversal of 65131601 is 10613156.

It is a happy number.

65131601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65131601 - 2²² = 60937297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65131621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (8600940).

Almost surely, 2^65131601 is an apocalyptic number.

It is an amenable number.

65131601 is a deficient number, since it is larger than the sum of its proper divisors (3675919).

65131601 is a wasteful number, since it uses less digits than its factorization.

65131601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12415.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 65131601 is about 8070.4151689984. The cubic root of 65131601 is about 402.3437424399.

Adding to 65131601 its reverse (10613156), we get a palindrome (75744757).

The spelling of 65131601 in words is "sixty-five million, one hundred thirty-one thousand, six hundred one".