2131307 has 4 divisors (see below), whose sum is σ = 2256696. Its totient is φ = 2005920.

The previous prime is 2131291. The next prime is 2131319. The reversal of 2131307 is 7031312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131307 - 2⁴ = 2131291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 125371 = 2131307 / (2 + 1 + 3 + 1 + 3 + 0 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62669 + ... + 62702.

It is an arithmetic number, because the mean of its divisors is an integer number (564174).

2^2131307 is an apocalyptic number.

2131307 is a deficient number, since it is larger than the sum of its proper divisors (125389).

2131307 is a wasteful number, since it uses less digits than its factorization.

2131307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125388.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 2131307 is about 1459.8996540859. The cubic root of 2131307 is about 128.6911466333.

Adding to 2131307 its reverse (7031312), we get a palindrome (9162619).

The spelling of 2131307 in words is "two million, one hundred thirty-one thousand, three hundred seven".