2221251045 has 16 divisors (see below), whose sum is σ = 3827386752. Its totient is φ = 1093538880.

The previous prime is 2221251023. The next prime is 2221251047. The reversal of 2221251045 is 5401521222.

It is not a de Polignac number, because 2221251045 - 2⁶ = 2221250981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221251047) 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, 5695321 + ... + 5695710.

It is an arithmetic number, because the mean of its divisors is an integer number (239211672).

Almost surely, 2^2221251045 is an apocalyptic number.

It is an amenable number.

2221251045 is a deficient number, since it is larger than the sum of its proper divisors (1606135707).

2221251045 is a wasteful number, since it uses less digits than its factorization.

2221251045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391052.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2221251045 is about 47130.1500634148. The cubic root of 2221251045 is about 1304.7657511755.

Adding to 2221251045 its reverse (5401521222), we get a palindrome (7622772267).

The spelling of 2221251045 in words is "two billion, two hundred twenty-one million, two hundred fifty-one thousand, forty-five".