2215156511 has 4 divisors (see below), whose sum is σ = 2240046000. Its totient is φ = 2190267024.

The previous prime is 2215156507. The next prime is 2215156523. The reversal of 2215156511 is 1156515122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2215156511 - 2² = 2215156507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215153511) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12444611 + ... + 12444788.

It is an arithmetic number, because the mean of its divisors is an integer number (560011500).

Almost surely, 2^2215156511 is an apocalyptic number.

2215156511 is a deficient number, since it is larger than the sum of its proper divisors (24889489).

2215156511 is an equidigital number, since it uses as much as digits as its factorization.

2215156511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24889488.

The product of its digits is 3000, while the sum is 29.

The square root of 2215156511 is about 47065.4492276447. The cubic root of 2215156511 is about 1303.5713457315.

The spelling of 2215156511 in words is "two billion, two hundred fifteen million, one hundred fifty-six thousand, five hundred eleven".