65001331 has 4 divisors (see below), whose sum is σ = 65041992. Its totient is φ = 64960672.

The previous prime is 65001301. The next prime is 65001361. The reversal of 65001331 is 13310056.

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

It is an interprime number because it is at equal distance from previous prime (65001301) and next prime (65001361).

It is a cyclic number.

It is not a de Polignac number, because 65001331 - 2¹⁹ = 64477043 is a prime.

It is a super-2 number, since 2×65001331² = 8450346063543122, 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 = 65001299 and 65001308.

It is not an unprimeable number, because it can be changed into a prime (65001301) 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, 17830 + ... + 21163.

It is an arithmetic number, because the mean of its divisors is an integer number (16260498).

Almost surely, 2^65001331 is an apocalyptic number.

65001331 is a deficient number, since it is larger than the sum of its proper divisors (40661).

65001331 is a wasteful number, since it uses less digits than its factorization.

65001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40660.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 65001331 is about 8062.3402929919. The cubic root of 65001331 is about 402.0753202432.

Adding to 65001331 its reverse (13310056), we get a palindrome (78311387).

The spelling of 65001331 in words is "sixty-five million, one thousand, three hundred thirty-one".