2145251212 has 48 divisors (see below), whose sum is σ = 4210682112. Its totient is φ = 949616640.

The previous prime is 2145251081. The next prime is 2145251237. The reversal of 2145251212 is 2121525412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176268 + ... + 188044.

It is an arithmetic number, because the mean of its divisors is an integer number (87722544).

Almost surely, 2^2145251212 is an apocalyptic number.

It is an amenable number.

2145251212 is a deficient number, since it is larger than the sum of its proper divisors (2065430900).

2145251212 is a wasteful number, since it uses less digits than its factorization.

2145251212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11938 (or 11936 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 2145251212 is about 46316.8566722743. The cubic root of 2145251212 is about 1289.7119345562.

Adding to 2145251212 its reverse (2121525412), we get a palindrome (4266776624).

The spelling of 2145251212 in words is "two billion, one hundred forty-five million, two hundred fifty-one thousand, two hundred twelve".