215550722050565 has 24 divisors (see below), whose sum is σ = 292241203851168. Its totient is φ = 151358500717760.

The previous prime is 215550722050549. The next prime is 215550722050567. The reversal of 215550722050565 is 565050227055512.

It is not a de Polignac number, because 215550722050565 - 2⁴ = 215550722050549 is a prime.

It is a super-2 number, since 2×215550722050565² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215550722050567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2329979927 + ... + 2330072436.

It is an arithmetic number, because the mean of its divisors is an integer number (12176716827132).

Almost surely, 2^{215550722050565} is an apocalyptic number.

It is an amenable number.

215550722050565 is a deficient number, since it is larger than the sum of its proper divisors (76690481800603).

215550722050565 is a wasteful number, since it uses less digits than its factorization.

215550722050565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660052437 (or 4660052408 counting only the distinct ones).

The product of its (nonzero) digits is 5250000, while the sum is 50.

The spelling of 215550722050565 in words is "two hundred fifteen trillion, five hundred fifty billion, seven hundred twenty-two million, fifty thousand, five hundred sixty-five".