2251721110 has 32 divisors (see below), whose sum is σ = 4141912320. Its totient is φ = 881164128.

The previous prime is 2251721083. The next prime is 2251721119. The reversal of 2251721110 is 111271522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251721119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72321 + ... + 98659.

It is an arithmetic number, because the mean of its divisors is an integer number (129434760).

Almost surely, 2^2251721110 is an apocalyptic number.

2251721110 is a deficient number, since it is larger than the sum of its proper divisors (1890191210).

2251721110 is a wasteful number, since it uses less digits than its factorization.

2251721110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26532.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 2251721110 is about 47452.3035268047. The cubic root of 2251721110 is about 1310.7047292973.

Adding to 2251721110 its reverse (111271522), we get a palindrome (2362992632).

The spelling of 2251721110 in words is "two billion, two hundred fifty-one million, seven hundred twenty-one thousand, one hundred ten".