2215612919971 has 16 divisors (see below), whose sum is σ = 2559644005248. Its totient is φ = 1895390582400.

The previous prime is 2215612919969. The next prime is 2215612920011. The reversal of 2215612919971 is 1799192165122.

It is a cyclic number.

It is not a de Polignac number, because 2215612919971 - 2¹ = 2215612919969 is a prime.

It is a super-2 number, since 2×2215612919971² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2215612919371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107416 + ... + 2107786.

It is an arithmetic number, because the mean of its divisors is an integer number (159977750328).

Almost surely, 2^{2215612919971} is an apocalyptic number.

2215612919971 is a deficient number, since it is larger than the sum of its proper divisors (344031085277).

2215612919971 is a wasteful number, since it uses less digits than its factorization.

2215612919971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006322.

The product of its digits is 1224720, while the sum is 55.

The spelling of 2215612919971 in words is "two trillion, two hundred fifteen billion, six hundred twelve million, nine hundred nineteen thousand, nine hundred seventy-one".