2215715161 has 4 divisors (see below), whose sum is σ = 2417143824. Its totient is φ = 2014286500.

The previous prime is 2215715083. The next prime is 2215715167. The reversal of 2215715161 is 1615175122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2215715161 - 2⁹ = 2215714649 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215715167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100714315 + ... + 100714336.

It is an arithmetic number, because the mean of its divisors is an integer number (604285956).

Almost surely, 2^2215715161 is an apocalyptic number.

It is an amenable number.

2215715161 is a deficient number, since it is larger than the sum of its proper divisors (201428663).

2215715161 is a wasteful number, since it uses less digits than its factorization.

2215715161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201428662.

The product of its digits is 4200, while the sum is 31.

The square root of 2215715161 is about 47071.3836741602. The cubic root of 2215715161 is about 1303.6809209719.

The spelling of 2215715161 in words is "two billion, two hundred fifteen million, seven hundred fifteen thousand, one hundred sixty-one".