2215144000549 has 4 divisors (see below), whose sum is σ = 2291528276460. Its totient is φ = 2138759724640.

The previous prime is 2215144000547. The next prime is 2215144000561. The reversal of 2215144000549 is 9450004415122.

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 1362694349025 + 852449651524 = 1167345^2 + 923282^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215144000549 - 2¹ = 2215144000547 is a prime.

It is a super-2 number, since 2×2215144000549² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215144000547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38192137912 + ... + 38192137969.

It is an arithmetic number, because the mean of its divisors is an integer number (572882069115).

Almost surely, 2^{2215144000549} is an apocalyptic number.

2215144000549 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2215144000549 is a deficient number, since it is larger than the sum of its proper divisors (76384275911).

2215144000549 is an equidigital number, since it uses as much as digits as its factorization.

2215144000549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76384275910.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 2215144000549 in words is "two trillion, two hundred fifteen billion, one hundred forty-four million, five hundred forty-nine", and thus it is an aban number.