2720221215 has 16 divisors (see below), whose sum is σ = 4359468768. Its totient is φ = 1448413056.

The previous prime is 2720221181. The next prime is 2720221253. The reversal of 2720221215 is 5121220272.

It is not a de Polignac number, because 2720221215 - 2⁷ = 2720221087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138724 + ... + 157113.

It is an arithmetic number, because the mean of its divisors is an integer number (272466798).

Almost surely, 2^2720221215 is an apocalyptic number.

2720221215 is a deficient number, since it is larger than the sum of its proper divisors (1639247553).

2720221215 is a wasteful number, since it uses less digits than its factorization.

2720221215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296458.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 2720221215 is about 52155.7400005023. The cubic root of 2720221215 is about 1395.9442509339.

Adding to 2720221215 its reverse (5121220272), we get a palindrome (7841441487).

The spelling of 2720221215 in words is "two billion, seven hundred twenty million, two hundred twenty-one thousand, two hundred fifteen".