2215207849 has 4 divisors (see below), whose sum is σ = 2245553236. Its totient is φ = 2184862464.

The previous prime is 2215207847. The next prime is 2215207859. The reversal of 2215207849 is 9487025122.

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 1800474624 + 414733225 = 42432^2 + 20365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215207849 - 2¹ = 2215207847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215207847) 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, 15172584 + ... + 15172729.

It is an arithmetic number, because the mean of its divisors is an integer number (561388309).

Almost surely, 2^2215207849 is an apocalyptic number.

It is an amenable number.

2215207849 is a deficient number, since it is larger than the sum of its proper divisors (30345387).

2215207849 is an equidigital number, since it uses as much as digits as its factorization.

2215207849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30345386.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2215207849 is about 47065.9946139461. The cubic root of 2215207849 is about 1303.5814160853.

The spelling of 2215207849 in words is "two billion, two hundred fifteen million, two hundred seven thousand, eight hundred forty-nine".