2511221045 has 16 divisors (see below), whose sum is σ = 3258620928. Its totient is φ = 1850568960.

The previous prime is 2511221021. The next prime is 2511221077. The reversal of 2511221045 is 5401221152.

2511221045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2511221045 - 2⁶ = 2511220981 is a prime.

It is a super-2 number, since 2×2511221045² = 12612462273701784050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2511221045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310301 + ... + 318290.

It is an arithmetic number, because the mean of its divisors is an integer number (203663808).

Almost surely, 2^2511221045 is an apocalyptic number.

It is an amenable number.

2511221045 is a deficient number, since it is larger than the sum of its proper divisors (747399883).

2511221045 is a wasteful number, since it uses less digits than its factorization.

2511221045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628660.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2511221045 is about 50112.0848199314. The cubic root of 2511221045 is about 1359.2363513111.

Adding to 2511221045 its reverse (5401221152), we get a palindrome (7912442197).

The spelling of 2511221045 in words is "two billion, five hundred eleven million, two hundred twenty-one thousand, forty-five".