2215122157 has 16 divisors (see below), whose sum is σ = 2346330240. Its totient is φ = 2087008000.

The previous prime is 2215122149. The next prime is 2215122191. The reversal of 2215122157 is 7512215122.

It is a cyclic number.

It is not a de Polignac number, because 2215122157 - 2³ = 2215122149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215122197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573282 + ... + 577132.

It is an arithmetic number, because the mean of its divisors is an integer number (146645640).

Almost surely, 2^2215122157 is an apocalyptic number.

It is an amenable number.

2215122157 is a deficient number, since it is larger than the sum of its proper divisors (131208083).

2215122157 is a wasteful number, since it uses less digits than its factorization.

2215122157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244.

The product of its digits is 2800, while the sum is 28.

The square root of 2215122157 is about 47065.0842663646. The cubic root of 2215122157 is about 1303.5646068365.

Adding to 2215122157 its reverse (7512215122), we get a palindrome (9727337279).

The spelling of 2215122157 in words is "two billion, two hundred fifteen million, one hundred twenty-two thousand, one hundred fifty-seven".