2511222011 has 4 divisors (see below), whose sum is σ = 2528076000. Its totient is φ = 2494368024.

The previous prime is 2511221987. The next prime is 2511222013. The reversal of 2511222011 is 1102221152.

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 2511222011 - 2²² = 2507027707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2511222013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8426771 + ... + 8427068.

It is an arithmetic number, because the mean of its divisors is an integer number (632019000).

Almost surely, 2^2511222011 is an apocalyptic number.

2511222011 is a deficient number, since it is larger than the sum of its proper divisors (16853989).

2511222011 is a wasteful number, since it uses less digits than its factorization.

2511222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16853988.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2511222011 is about 50112.0944583241. The cubic root of 2511222011 is about 1359.2365255985.

Adding to 2511222011 its reverse (1102221152), we get a palindrome (3613443163).

The spelling of 2511222011 in words is "two billion, five hundred eleven million, two hundred twenty-two thousand, eleven".