247155161 has 16 divisors (see below), whose sum is σ = 274606848. Its totient is φ = 220558800.

The previous prime is 247155149. The next prime is 247155179. The reversal of 247155161 is 161551742.

It is not a de Polignac number, because 247155161 - 2¹⁴ = 247138777 is a prime.

It is a super-2 number, since 2×247155161² = 122171347217871842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247155361) 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 15 ways as a sum of consecutive naturals, for example, 361526 + ... + 362208.

It is an arithmetic number, because the mean of its divisors is an integer number (17162928).

Almost surely, 2^247155161 is an apocalyptic number.

It is an amenable number.

247155161 is a deficient number, since it is larger than the sum of its proper divisors (27451687).

247155161 is a wasteful number, since it uses less digits than its factorization.

247155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its digits is 8400, while the sum is 32.

The square root of 247155161 is about 15721.1691995220. The cubic root of 247155161 is about 627.5618884690.

The spelling of 247155161 in words is "two hundred forty-seven million, one hundred fifty-five thousand, one hundred sixty-one".