2151244225 has 24 divisors (see below), whose sum is σ = 2965421312. Its totient is φ = 1537358400.

The previous prime is 2151244219. The next prime is 2151244229. The reversal of 2151244225 is 5224421512.

It is a happy number.

It is not a de Polignac number, because 2151244225 - 2⁹ = 2151243713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2151244193 and 2151244202.

It is not an unprimeable number, because it can be changed into a prime (2151244229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96687 + ... + 116836.

Almost surely, 2^2151244225 is an apocalyptic number.

2151244225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2151244225 is a deficient number, since it is larger than the sum of its proper divisors (814177087).

2151244225 is a wasteful number, since it uses less digits than its factorization.

2151244225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213577 (or 213572 counting only the distinct ones).

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

The square root of 2151244225 is about 46381.5073601538. The cubic root of 2151244225 is about 1290.9118055336.

Adding to 2151244225 its reverse (5224421512), we get a palindrome (7375665737).

The spelling of 2151244225 in words is "two billion, one hundred fifty-one million, two hundred forty-four thousand, two hundred twenty-five".