2225121345 has 12 divisors (see below), whose sum is σ = 3856877076. Its totient is φ = 1186731360.

The previous prime is 2225121343. The next prime is 2225121413. The reversal of 2225121345 is 5431215222.

It can be written as a sum of positive squares in 2 ways, for example, as 868598784 + 1356522561 = 29472^2 + 36831^2 .

It is not a de Polignac number, because 2225121345 - 2¹ = 2225121343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2225121343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24723526 + ... + 24723615.

It is an arithmetic number, because the mean of its divisors is an integer number (321406423).

Almost surely, 2^2225121345 is an apocalyptic number.

It is an amenable number.

2225121345 is a deficient number, since it is larger than the sum of its proper divisors (1631755731).

2225121345 is a wasteful number, since it uses less digits than its factorization.

2225121345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49447152 (or 49447149 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2225121345 is about 47171.1918971739. The cubic root of 2225121345 is about 1305.5231178849.

Adding to 2225121345 its reverse (5431215222), we get a palindrome (7656336567).

The spelling of 2225121345 in words is "two billion, two hundred twenty-five million, one hundred twenty-one thousand, three hundred forty-five".