2215261465 has 4 divisors (see below), whose sum is σ = 2658313764. Its totient is φ = 1772209168.

The previous prime is 2215261463. The next prime is 2215261469. The reversal of 2215261465 is 5641625122.

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 1681328016 + 533933449 = 41004^2 + 23107^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215261465 - 2¹ = 2215261463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2215261465.

It is not an unprimeable number, because it can be changed into a prime (2215261463) 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 in 3 ways as a sum of consecutive naturals, for example, 221526142 + ... + 221526151.

It is an arithmetic number, because the mean of its divisors is an integer number (664578441).

Almost surely, 2^2215261465 is an apocalyptic number.

It is an amenable number.

2215261465 is a deficient number, since it is larger than the sum of its proper divisors (443052299).

2215261465 is an equidigital number, since it uses as much as digits as its factorization.

2215261465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443052298.

The product of its digits is 28800, while the sum is 34.

The square root of 2215261465 is about 47066.5641937034. The cubic root of 2215261465 is about 1303.5919331205.

Adding to 2215261465 its reverse (5641625122), we get a palindrome (7856886587).

The spelling of 2215261465 in words is "two billion, two hundred fifteen million, two hundred sixty-one thousand, four hundred sixty-five".