247277223 has 24 divisors (see below), whose sum is σ = 380343600. Its totient is φ = 154270464.

The previous prime is 247277203. The next prime is 247277231. The reversal of 247277223 is 322772742.

It is a happy number.

It is not a de Polignac number, because 247277223 - 2⁶ = 247277159 is a prime.

It is a super-2 number, since 2×247277223² = 122292050029183458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247277203) 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 23 ways as a sum of consecutive naturals, for example, 22873 + ... + 31901.

It is an arithmetic number, because the mean of its divisors is an integer number (15847650).

Almost surely, 2^247277223 is an apocalyptic number.

247277223 is a deficient number, since it is larger than the sum of its proper divisors (133066377).

247277223 is a wasteful number, since it uses less digits than its factorization.

247277223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231 (or 9228 counting only the distinct ones).

The product of its digits is 65856, while the sum is 36.

The square root of 247277223 is about 15725.0508107287. The cubic root of 247277223 is about 627.6651823568.

The spelling of 247277223 in words is "two hundred forty-seven million, two hundred seventy-seven thousand, two hundred twenty-three".