2166221655352 has 16 divisors (see below), whose sum is σ = 4300587110160. Its totient is φ = 1019398425984.

The previous prime is 2166221655347. The next prime is 2166221655397. The reversal of 2166221655352 is 2535561226612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7964050068 + ... + 7964050339.

It is an arithmetic number, because the mean of its divisors is an integer number (268786694385).

Almost surely, 2^{2166221655352} is an apocalyptic number.

It is an amenable number.

2166221655352 is a deficient number, since it is larger than the sum of its proper divisors (2134365454808).

2166221655352 is a wasteful number, since it uses less digits than its factorization.

2166221655352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15928100430 (or 15928100426 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The spelling of 2166221655352 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-five thousand, three hundred fifty-two".