247147271140 has 144 divisors (see below), whose sum is σ = 660561519744. Its totient is φ = 77031763200.

The previous prime is 247147271123. The next prime is 247147271153. The reversal of 247147271140 is 41172741742.

It is a super-2 number, since 2×247147271140² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247147271093 and 247147271102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3664120 + ... + 3730960.

It is an arithmetic number, because the mean of its divisors is an integer number (4587232776).

Almost surely, 2^247147271140 is an apocalyptic number.

247147271140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247147271140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330280759872).

247147271140 is an abundant number, since it is smaller than the sum of its proper divisors (413414248604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247147271140 is an equidigital number, since it uses as much as digits as its factorization.

247147271140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66896 (or 66866 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 40.

The spelling of 247147271140 in words is "two hundred forty-seven billion, one hundred forty-seven million, two hundred seventy-one thousand, one hundred forty".