215165562172 has 24 divisors (see below), whose sum is σ = 413040084912. Its totient is φ = 97262179200.

The previous prime is 215165562163. The next prime is 215165562179. The reversal of 215165562172 is 271265561512.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215165562179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13500673 + ... + 13516600.

It is an arithmetic number, because the mean of its divisors is an integer number (17210003538).

Almost surely, 2^215165562172 is an apocalyptic number.

215165562172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215165562172 is a deficient number, since it is larger than the sum of its proper divisors (197874522740).

215165562172 is a wasteful number, since it uses less digits than its factorization.

215165562172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27017469 (or 27017467 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The spelling of 215165562172 in words is "two hundred fifteen billion, one hundred sixty-five million, five hundred sixty-two thousand, one hundred seventy-two".