2151222305 has 8 divisors (see below), whose sum is σ = 2625220800. Its totient is φ = 1691808496.

The previous prime is 2151222299. The next prime is 2151222343. The reversal of 2151222305 is 5032221512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151222305 - 2²⁸ = 1882786849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3645845 + ... + 3646434.

It is an arithmetic number, because the mean of its divisors is an integer number (328152600).

Almost surely, 2^2151222305 is an apocalyptic number.

It is an amenable number.

2151222305 is a deficient number, since it is larger than the sum of its proper divisors (473998495).

2151222305 is an equidigital number, since it uses as much as digits as its factorization.

2151222305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7292343.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2151222305 is about 46381.2710584779. The cubic root of 2151222305 is about 1290.9074209573.

Adding to 2151222305 its reverse (5032221512), we get a palindrome (7183443817).

The spelling of 2151222305 in words is "two billion, one hundred fifty-one million, two hundred twenty-two thousand, three hundred five".