247331 has 8 divisors (see below), whose sum is σ = 286560. Its totient is φ = 209088.

The previous prime is 247309. The next prime is 247337. The reversal of 247331 is 133742.

247331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247331 is a prime.

It is a super-2 number, since 2×247331² = 122345247122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (247337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (35820).

2²⁴⁷³³¹ is an apocalyptic number.

247331 is a deficient number, since it is larger than the sum of its proper divisors (39229).

247331 is an equidigital number, since it uses as much as digits as its factorization.

247331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its digits is 504, while the sum is 20.

The square root of 247331 is about 497.3238381578. The cubic root of 247331 is about 62.7710679880.

The spelling of 247331 in words is "two hundred forty-seven thousand, three hundred thirty-one".