2131320 has 32 divisors (see below), whose sum is σ = 6394320. Its totient is φ = 568320.

The previous prime is 2131319. The next prime is 2131321. The reversal of 2131320 is 231312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2131319) and next prime (2131321).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2131296 and 2131305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131321) 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, 8761 + ... + 9000.

2^2131320 is an apocalyptic number.

2131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131320 is an abundant number, since it is smaller than the sum of its proper divisors (4263000).

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

2131320 is a wasteful number, since it uses less digits than its factorization.

2131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17775 (or 17771 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 2131320 is about 1459.9041064399. The cubic root of 2131320 is about 128.6914082852.

Adding to 2131320 its reverse (231312), we get a palindrome (2362632).

The spelling of 2131320 in words is "two million, one hundred thirty-one thousand, three hundred twenty".