2171504420 has 24 divisors (see below), whose sum is σ = 4596071424. Its totient is φ = 861761376.

The previous prime is 2171504411. The next prime is 2171504459. The reversal of 2171504420 is 244051712.

It is a self number, because there is not a number n which added to its sum of digits gives 2171504420.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 424922 + ... + 430001.

It is an arithmetic number, because the mean of its divisors is an integer number (191502976).

Almost surely, 2^2171504420 is an apocalyptic number.

2171504420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171504420 is an abundant number, since it is smaller than the sum of its proper divisors (2424567004).

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

2171504420 is a wasteful number, since it uses less digits than its factorization.

2171504420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855059 (or 855057 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2171504420 is about 46599.4036442528. The cubic root of 2171504420 is about 1294.9517073269.

The spelling of 2171504420 in words is "two billion, one hundred seventy-one million, five hundred four thousand, four hundred twenty".