247641441 has 4 divisors (see below), whose sum is σ = 330188592. Its totient is φ = 165094292.

The previous prime is 247641439. The next prime is 247641451. The reversal of 247641441 is 144146742.

247641441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 247641441 - 2¹ = 247641439 is a prime.

It is a super-2 number, since 2×247641441² = 122652566601112962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (247641451) 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, 41273571 + ... + 41273576.

It is an arithmetic number, because the mean of its divisors is an integer number (82547148).

Almost surely, 2^247641441 is an apocalyptic number.

It is an amenable number.

247641441 is a deficient number, since it is larger than the sum of its proper divisors (82547151).

247641441 is an equidigital number, since it uses as much as digits as its factorization.

247641441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82547150.

The product of its digits is 21504, while the sum is 33.

The square root of 247641441 is about 15736.6273705645. The cubic root of 247641441 is about 627.9731967207.

The spelling of 247641441 in words is "two hundred forty-seven million, six hundred forty-one thousand, four hundred forty-one".