51225132247 has 2 divisors, whose sum is σ = 51225132248. Its totient is φ = 51225132246.

The previous prime is 51225132223. The next prime is 51225132253. The reversal of 51225132247 is 74223152215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51225132247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51225132947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612566123 + 25612566124.

It is an arithmetic number, because the mean of its divisors is an integer number (25612566124).

Almost surely, 2^51225132247 is an apocalyptic number.

51225132247 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225132247 is an equidigital number, since it uses as much as digits as its factorization.

51225132247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The spelling of 51225132247 in words is "fifty-one billion, two hundred twenty-five million, one hundred thirty-two thousand, two hundred forty-seven".