2216331505 has 4 divisors (see below), whose sum is σ = 2659597812. Its totient is φ = 1773065200.

The previous prime is 2216331493. The next prime is 2216331521. The reversal of 2216331505 is 5051336122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 588693169 + 1627638336 = 24263^2 + 40344^2 .

It is not a de Polignac number, because 2216331505 - 2⁹ = 2216330993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221633146 + ... + 221633155.

It is an arithmetic number, because the mean of its divisors is an integer number (664899453).

Almost surely, 2^2216331505 is an apocalyptic number.

It is an amenable number.

2216331505 is a deficient number, since it is larger than the sum of its proper divisors (443266307).

2216331505 is an equidigital number, since it uses as much as digits as its factorization.

2216331505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443266306.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 2216331505 is about 47077.9301265466. The cubic root of 2216331505 is about 1303.8017911142.

Adding to 2216331505 its reverse (5051336122), we get a palindrome (7267667627).

The spelling of 2216331505 in words is "two billion, two hundred sixteen million, three hundred thirty-one thousand, five hundred five".