2166222651 has 8 divisors (see below), whose sum is σ = 2898504000. Its totient is φ = 1439044872.

The previous prime is 2166222601. The next prime is 2166222677. The reversal of 2166222651 is 1562226612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166222651 - 2¹¹ = 2166220603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166222601) 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, 1274901 + ... + 1276598.

It is an arithmetic number, because the mean of its divisors is an integer number (362313000).

Almost surely, 2^2166222651 is an apocalyptic number.

2166222651 is a deficient number, since it is larger than the sum of its proper divisors (732281349).

2166222651 is a wasteful number, since it uses less digits than its factorization.

2166222651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551785.

The product of its digits is 17280, while the sum is 33.

The square root of 2166222651 is about 46542.6970748366. The cubic root of 2166222651 is about 1293.9009475256.

The spelling of 2166222651 in words is "two billion, one hundred sixty-six million, two hundred twenty-two thousand, six hundred fifty-one".