2251145224 has 8 divisors (see below), whose sum is σ = 4220897310. Its totient is φ = 1125572608.

The previous prime is 2251145209. The next prime is 2251145257. The reversal of 2251145224 is 4225411522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2187432900 + 63712324 = 46770^2 + 7982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2251145192 and 2251145201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140696569 + ... + 140696584.

Almost surely, 2^2251145224 is an apocalyptic number.

It is an amenable number.

2251145224 is a deficient number, since it is larger than the sum of its proper divisors (1969752086).

2251145224 is a wasteful number, since it uses less digits than its factorization.

2251145224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281393159 (or 281393155 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 2251145224 is about 47446.2350877285. The cubic root of 2251145224 is about 1310.5929805764.

Adding to 2251145224 its reverse (4225411522), we get a palindrome (6476556746).

The spelling of 2251145224 in words is "two billion, two hundred fifty-one million, one hundred forty-five thousand, two hundred twenty-four".