247552231 has 4 divisors (see below), whose sum is σ = 250534872. Its totient is φ = 244569592.

The previous prime is 247552199. The next prime is 247552303. The reversal of 247552231 is 132255742.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132255742 = 2 ⋅66127871.

It is a cyclic number.

It is not a de Polignac number, because 247552231 - 2⁵ = 247552199 is a prime.

It is a super-2 number, since 2×247552231² = 122564214146154722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247552193 and 247552202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247552531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491196 + ... + 1491361.

It is an arithmetic number, because the mean of its divisors is an integer number (62633718).

Almost surely, 2^247552231 is an apocalyptic number.

247552231 is a deficient number, since it is larger than the sum of its proper divisors (2982641).

247552231 is an equidigital number, since it uses as much as digits as its factorization.

247552231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982640.

The product of its digits is 16800, while the sum is 31.

The square root of 247552231 is about 15733.7926451317. The cubic root of 247552231 is about 627.8977809408.

The spelling of 247552231 in words is "two hundred forty-seven million, five hundred fifty-two thousand, two hundred thirty-one".