247716481 has 2 divisors, whose sum is σ = 247716482. Its totient is φ = 247716480.

The previous prime is 247716467. The next prime is 247716533. The reversal of 247716481 is 184617742.

It is a happy number.

247716481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213890625 + 33825856 = 14625^2 + 5816^2 .

It is a cyclic number.

It is not a de Polignac number, because 247716481 - 2⁹ = 247715969 is a prime.

It is a super-2 number, since 2×247716481² = 122726909918046722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247716431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123858240 + 123858241.

It is an arithmetic number, because the mean of its divisors is an integer number (123858241).

Almost surely, 2^247716481 is an apocalyptic number.

It is an amenable number.

247716481 is a deficient number, since it is larger than the sum of its proper divisors (1).

247716481 is an equidigital number, since it uses as much as digits as its factorization.

247716481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 40.

The square root of 247716481 is about 15739.0114365547. The cubic root of 247716481 is about 628.0366195328.

The spelling of 247716481 in words is "two hundred forty-seven million, seven hundred sixteen thousand, four hundred eighty-one".