2171361536 has 18 divisors (see below), whose sum is σ = 4334241702. Its totient is φ = 1085680640.

The previous prime is 2171361523. The next prime is 2171361581. The reversal of 2171361536 is 6351631712.

It can be written as a sum of positive squares in only one way, i.e., 2166343936 + 5017600 = 46544^2 + 2240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2171361496 and 2171361505.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4240685 + ... + 4241196.

Almost surely, 2^2171361536 is an apocalyptic number.

It is an amenable number.

2171361536 is a deficient number, since it is larger than the sum of its proper divisors (2162880166).

2171361536 is an frugal number, since it uses more digits than its factorization.

2171361536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8481897 (or 8481883 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 2171361536 is about 46597.8705092840. The cubic root of 2171361536 is about 1294.9233042934.

The spelling of 2171361536 in words is "two billion, one hundred seventy-one million, three hundred sixty-one thousand, five hundred thirty-six".