247216049 has 6 divisors (see below), whose sum is σ = 260912610. Its totient is φ = 234204336.

The previous prime is 247216037. The next prime is 247216051. The reversal of 247216049 is 940612742.

It can be written as a sum of positive squares in only one way, i.e., 232776049 + 14440000 = 15257^2 + 3800^2 .

It is not a de Polignac number, because 247216049 - 2¹² = 247211953 is a prime.

It is a super-2 number, since 2×247216049² = 122231549766340802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247216349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342044 + ... + 342765.

It is an arithmetic number, because the mean of its divisors is an integer number (43485435).

Almost surely, 2^247216049 is an apocalyptic number.

It is an amenable number.

247216049 is a deficient number, since it is larger than the sum of its proper divisors (13696561).

247216049 is an equidigital number, since it uses as much as digits as its factorization.

247216049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684847 (or 684828 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 247216049 is about 15723.1055774615. The cubic root of 247216049 is about 627.6134186505.

The spelling of 247216049 in words is "two hundred forty-seven million, two hundred sixteen thousand, forty-nine".