247972225 has 6 divisors (see below), whose sum is σ = 307485590. Its totient is φ = 198377760.

The previous prime is 247972163. The next prime is 247972267. The reversal of 247972225 is 522279742.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4892944 + 243079281 = 2212^2 + 15591^2 .

It is not a de Polignac number, because 247972225 - 2¹³ = 247964033 is a prime.

It is a super-2 number, since 2×247972225² = 122980448742901250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4959420 + ... + 4959469.

Almost surely, 2^247972225 is an apocalyptic number.

247972225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

247972225 is a deficient number, since it is larger than the sum of its proper divisors (59513365).

247972225 is an equidigital number, since it uses as much as digits as its factorization.

247972225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9918899 (or 9918894 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 247972225 is about 15747.1338661993. The cubic root of 247972225 is about 628.2526748049.

The spelling of 247972225 in words is "two hundred forty-seven million, nine hundred seventy-two thousand, two hundred twenty-five".