247225746857 has 2 divisors, whose sum is σ = 247225746858. Its totient is φ = 247225746856.

The previous prime is 247225746853. The next prime is 247225746863. The reversal of 247225746857 is 758647522742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223323350041 + 23902396816 = 472571^2 + 154604^2 .

It is a cyclic number.

It is not a de Polignac number, because 247225746857 - 2² = 247225746853 is a prime.

It is a super-2 number, since 2×247225746857² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247225746796 and 247225746805.

It is not a weakly prime, because it can be changed into another prime (247225746851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123612873428 + 123612873429.

It is an arithmetic number, because the mean of its divisors is an integer number (123612873429).

Almost surely, 2^247225746857 is an apocalyptic number.

It is an amenable number.

247225746857 is a deficient number, since it is larger than the sum of its proper divisors (1).

247225746857 is an equidigital number, since it uses as much as digits as its factorization.

247225746857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52684800, while the sum is 59.

The spelling of 247225746857 in words is "two hundred forty-seven billion, two hundred twenty-five million, seven hundred forty-six thousand, eight hundred fifty-seven".