2251343662225 has 18 divisors (see below), whose sum is σ = 3247448370054. Its totient is φ = 1543778510400.

The previous prime is 2251343662223. The next prime is 2251343662237. The reversal of 2251343662225 is 5222663431522.

It can be written as a sum of positive squares in 3 ways, for example, as 674239696641 + 1577103965584 = 821121^2 + 1255828^2 .

It is not a de Polignac number, because 2251343662225 - 2¹ = 2251343662223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2251343662223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 918914556 + ... + 918917005.

Almost surely, 2^{2251343662225} is an apocalyptic number.

2251343662225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2251343662225 is a deficient number, since it is larger than the sum of its proper divisors (996104707829).

2251343662225 is a wasteful number, since it uses less digits than its factorization.

2251343662225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837831585 (or 1837831573 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 43.

The spelling of 2251343662225 in words is "two trillion, two hundred fifty-one billion, three hundred forty-three million, six hundred sixty-two thousand, two hundred twenty-five".