2215323157 has 2 divisors, whose sum is σ = 2215323158. Its totient is φ = 2215323156.

The previous prime is 2215323113. The next prime is 2215323161. The reversal of 2215323157 is 7513235122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1489882801 + 725440356 = 38599^2 + 26934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2215323157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215323557) 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 as a sum of consecutive naturals, namely, 1107661578 + 1107661579.

It is an arithmetic number, because the mean of its divisors is an integer number (1107661579).

Almost surely, 2^2215323157 is an apocalyptic number.

It is an amenable number.

2215323157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215323157 is an equidigital number, since it uses as much as digits as its factorization.

2215323157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 2215323157 is about 47067.2195588395. The cubic root of 2215323157 is about 1303.6040340920.

Adding to 2215323157 its reverse (7513235122), we get a palindrome (9728558279).

The spelling of 2215323157 in words is "two billion, two hundred fifteen million, three hundred twenty-three thousand, one hundred fifty-seven".