247347580721 has 8 divisors (see below), whose sum is σ = 247657592544. Its totient is φ = 247037765760.

The previous prime is 247347580687. The next prime is 247347580729. The reversal of 247347580721 is 127085743742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247347580721 - 2¹⁴ = 247347564337 is a prime.

It is a super-2 number, since 2×247347580721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 247347580721.

It is not an unprimeable number, because it can be changed into a prime (247347580729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550506 + ... + 2645708.

It is an arithmetic number, because the mean of its divisors is an integer number (30957199068).

Almost surely, 2^247347580721 is an apocalyptic number.

It is an amenable number.

247347580721 is a deficient number, since it is larger than the sum of its proper divisors (310011823).

247347580721 is a wasteful number, since it uses less digits than its factorization.

247347580721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98431.

The product of its (nonzero) digits is 2634240, while the sum is 50.

The spelling of 247347580721 in words is "two hundred forty-seven billion, three hundred forty-seven million, five hundred eighty thousand, seven hundred twenty-one".