247040809024 has 21 divisors (see below), whose sum is σ = 490229495917. Its totient is φ = 123518416384.

The previous prime is 247040809021. The next prime is 247040809061. The reversal of 247040809024 is 420908040742.

The square root of 247040809024 is 497032.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 237200169024 + 9840640000 = 487032^2 + 99200^2 .

It is a super-2 number, since 2×247040809024² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247040809021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3945192 + ... + 4007320.

Almost surely, 2^247040809024 is an apocalyptic number.

247040809024 is the 497032-nd square number.

It is an amenable number.

247040809024 is a deficient number, since it is larger than the sum of its proper divisors (243188686893).

247040809024 is an frugal number, since it uses more digits than its factorization.

247040809024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124270 (or 62131 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

Adding to 247040809024 its reverse (420908040742), we get a palindrome (667948849766).

The spelling of 247040809024 in words is "two hundred forty-seven billion, forty million, eight hundred nine thousand, twenty-four".