2126171560 has 16 divisors (see below), whose sum is σ = 4783886100. Its totient is φ = 850468608.

The previous prime is 2126171539. The next prime is 2126171581. The reversal of 2126171560 is 651716212.

It is an interprime number because it is at equal distance from previous prime (2126171539) and next prime (2126171581).

It can be written as a sum of positive squares in 2 ways, for example, as 2064611844 + 61559716 = 45438^2 + 7846^2 .

It is an unprimeable number.

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, 26577105 + ... + 26577184.

Almost surely, 2^2126171560 is an apocalyptic number.

2126171560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2126171560 is an abundant number, since it is smaller than the sum of its proper divisors (2657714540).

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

2126171560 is a wasteful number, since it uses less digits than its factorization.

2126171560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53154300 (or 53154296 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2126171560 is about 46110.4278878433. The cubic root of 2126171560 is about 1285.8770194253.

Adding to 2126171560 its reverse (651716212), we get a palindrome (2777887772).

The spelling of 2126171560 in words is "two billion, one hundred twenty-six million, one hundred seventy-one thousand, five hundred sixty".