51025220797 has 2 divisors, whose sum is σ = 51025220798. Its totient is φ = 51025220796.

The previous prime is 51025220791. The next prime is 51025220819. The reversal of 51025220797 is 79702252015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36018725796 + 15006495001 = 189786^2 + 122501^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025220797 - 2¹⁵ = 51025188029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51025220791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512610398 + 25512610399.

It is an arithmetic number, because the mean of its divisors is an integer number (25512610399).

Almost surely, 2^51025220797 is an apocalyptic number.

It is an amenable number.

51025220797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025220797 is an equidigital number, since it uses as much as digits as its factorization.

51025220797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 51025220797 in words is "fifty-one billion, twenty-five million, two hundred twenty thousand, seven hundred ninety-seven".