65015855 has 4 divisors (see below), whose sum is σ = 78019032. Its totient is φ = 52012680.

The previous prime is 65015851. The next prime is 65015857. The reversal of 65015855 is 55851056.

65015855 is nontrivially palindromic in base 4.

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

It is not a de Polignac number, because 65015855 - 2² = 65015851 is a prime.

It is a super-2 number, since 2×65015855² = 8454122802762050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65015851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6501581 + ... + 6501590.

It is an arithmetic number, because the mean of its divisors is an integer number (19504758).

Almost surely, 2^65015855 is an apocalyptic number.

65015855 is a deficient number, since it is larger than the sum of its proper divisors (13003177).

65015855 is a wasteful number, since it uses less digits than its factorization.

65015855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13003176.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 65015855 is about 8063.2409737028. The cubic root of 65015855 is about 402.1052647945.

The spelling of 65015855 in words is "sixty-five million, fifteen thousand, eight hundred fifty-five".