2551217247 has 24 divisors (see below), whose sum is σ = 3863603328. Its totient is φ = 1619125200.

The previous prime is 2551217243. The next prime is 2551217257. The reversal of 2551217247 is 7427121552.

It is not a de Polignac number, because 2551217247 - 2² = 2551217243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551217243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14472 + ... + 72882.

It is an arithmetic number, because the mean of its divisors is an integer number (160983472).

Almost surely, 2^2551217247 is an apocalyptic number.

2551217247 is a deficient number, since it is larger than the sum of its proper divisors (1312386081).

2551217247 is a wasteful number, since it uses less digits than its factorization.

2551217247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58651 (or 58648 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2551217247 is about 50509.5757950906. The cubic root of 2551217247 is about 1366.4145590160.

Adding to 2551217247 its reverse (7427121552), we get a palindrome (9978338799).

The spelling of 2551217247 in words is "two billion, five hundred fifty-one million, two hundred seventeen thousand, two hundred forty-seven".