2215440545 has 16 divisors (see below), whose sum is σ = 2713571280. Its totient is φ = 1735778304.

The previous prime is 2215440541. The next prime is 2215440547. The reversal of 2215440545 is 5450445122.

It can be written as a sum of positive squares in 8 ways, for example, as 84787264 + 2130653281 = 9208^2 + 46159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215440545 - 2² = 2215440541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2215440541) 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 15 ways as a sum of consecutive naturals, for example, 145661 + ... + 160149.

It is an arithmetic number, because the mean of its divisors is an integer number (169598205).

Almost surely, 2^2215440545 is an apocalyptic number.

It is an amenable number.

2215440545 is a deficient number, since it is larger than the sum of its proper divisors (498130735).

2215440545 is a wasteful number, since it uses less digits than its factorization.

2215440545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15124.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2215440545 is about 47068.4665673315. The cubic root of 2215440545 is about 1303.6270592906.

Adding to 2215440545 its reverse (5450445122), we get a palindrome (7665885667).

The spelling of 2215440545 in words is "two billion, two hundred fifteen million, four hundred forty thousand, five hundred forty-five".