2447181961 has 27 divisors (see below), whose sum is σ = 2941137927. Its totient is φ = 2030207760.

The previous prime is 2447181959. The next prime is 2447182021. The reversal of 2447181961 is 1691817442.

The square root of 2447181961 is 49469.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2189772025 + 257409936 = 46795^2 + 16044^2 .

It is not a de Polignac number, because 2447181961 - 2¹ = 2447181959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2447181911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12812376 + ... + 12812566.

Almost surely, 2^2447181961 is an apocalyptic number.

2447181961 is the 49469-th square number.

2447181961 is the 24735-th centered octagonal number.

It is an amenable number.

2447181961 is a deficient number, since it is larger than the sum of its proper divisors (493955966).

2447181961 is an frugal number, since it uses more digits than its factorization.

2447181961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 235 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The cubic root of 2447181961 is about 1347.5826811582.

The spelling of 2447181961 in words is "two billion, four hundred forty-seven million, one hundred eighty-one thousand, nine hundred sixty-one".