2361871721 has 12 divisors (see below), whose sum is σ = 2622883956. Its totient is φ = 2125009920.

The previous prime is 2361871717. The next prime is 2361871723. The reversal of 2361871721 is 1271781632.

2361871721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1878355600 + 483516121 = 43340^2 + 21989^2 .

It is not a de Polignac number, because 2361871721 - 2² = 2361871717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2361871723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88880 + ... + 112353.

It is an arithmetic number, because the mean of its divisors is an integer number (218573663).

Almost surely, 2^2361871721 is an apocalyptic number.

It is an amenable number.

2361871721 is a deficient number, since it is larger than the sum of its proper divisors (261012235).

2361871721 is a wasteful number, since it uses less digits than its factorization.

2361871721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201352 (or 201341 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 2361871721 is about 48599.0917713490. The cubic root of 2361871721 is about 1331.7379283500.

The spelling of 2361871721 in words is "two billion, three hundred sixty-one million, eight hundred seventy-one thousand, seven hundred twenty-one".