2171320 has 32 divisors (see below), whose sum is σ = 5144400. Its totient is φ = 822528.

The previous prime is 2171311. The next prime is 2171329. The reversal of 2171320 is 231712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2171311) and next prime (2171329).

It is a junction number, because it is equal to n+sod(n) for n = 2171294 and 2171303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669 + ... + 2188.

2^2171320 is an apocalyptic number.

2171320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171320 is an abundant number, since it is smaller than the sum of its proper divisors (2973080).

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

2171320 is a wasteful number, since it uses less digits than its factorization.

2171320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887 (or 2883 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2171320 is about 1473.5399553456. The cubic root of 2171320 is about 129.4915047373.

The spelling of 2171320 in words is "two million, one hundred seventy-one thousand, three hundred twenty".