13865823215 has 16 divisors (see below), whose sum is σ = 17613050400. Its totient is φ = 10461075072.

The previous prime is 13865823199. The next prime is 13865823241. The reversal of 13865823215 is 51232856831.

It is a cyclic number.

It is not a de Polignac number, because 13865823215 - 2⁴ = 13865823199 is a prime.

It is a super-3 number, since 3×13865823215³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1105700 + ... + 1118169.

It is an arithmetic number, because the mean of its divisors is an integer number (1100815650).

Almost surely, 2^13865823215 is an apocalyptic number.

13865823215 is a deficient number, since it is larger than the sum of its proper divisors (3747227185).

13865823215 is a wasteful number, since it uses less digits than its factorization.

13865823215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223946.

The product of its digits is 345600, while the sum is 44.

The spelling of 13865823215 in words is "thirteen billion, eight hundred sixty-five million, eight hundred twenty-three thousand, two hundred fifteen".