247145556253 has 4 divisors (see below), whose sum is σ = 247396976928. Its totient is φ = 246894135580.

The previous prime is 247145556223. The next prime is 247145556289. The reversal of 247145556253 is 352655541742.

247145556253 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 247145556253 - 2¹⁷ = 247145425181 is a prime.

It is a super-2 number, since 2×247145556253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247145556197 and 247145556206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247145556223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125708863 + ... + 125710828.

It is an arithmetic number, because the mean of its divisors is an integer number (61849244232).

Almost surely, 2^247145556253 is an apocalyptic number.

It is an amenable number.

247145556253 is a deficient number, since it is larger than the sum of its proper divisors (251420675).

247145556253 is an equidigital number, since it uses as much as digits as its factorization.

247145556253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251420674.

The product of its digits is 5040000, while the sum is 49.

The spelling of 247145556253 in words is "two hundred forty-seven billion, one hundred forty-five million, five hundred fifty-six thousand, two hundred fifty-three".