2215857613 has 2 divisors, whose sum is σ = 2215857614. Its totient is φ = 2215857612.

The previous prime is 2215857599. The next prime is 2215857619. The reversal of 2215857613 is 3167585122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2212479369 + 3378244 = 47037^2 + 1838^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215857613 - 2¹³ = 2215849421 is a prime.

It is a super-2 number, since 2×2215857613² = 9820049922180115538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215857619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107928806 + 1107928807.

It is an arithmetic number, because the mean of its divisors is an integer number (1107928807).

Almost surely, 2^2215857613 is an apocalyptic number.

It is an amenable number.

2215857613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215857613 is an equidigital number, since it uses as much as digits as its factorization.

2215857613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 2215857613 is about 47072.8967984763. The cubic root of 2215857613 is about 1303.7088589756.

The spelling of 2215857613 in words is "two billion, two hundred fifteen million, eight hundred fifty-seven thousand, six hundred thirteen".