2157307 has 2 divisors, whose sum is σ = 2157308. Its totient is φ = 2157306.

The previous prime is 2157301. The next prime is 2157313. The reversal of 2157307 is 7037512.

It is a balanced prime because it is at equal distance from previous prime (2157301) and next prime (2157313).

It is a cyclic number.

It is not a de Polignac number, because 2157307 - 2¹¹ = 2155259 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157301) by changing a digit.

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 as a sum of consecutive naturals, namely, 1078653 + 1078654.

It is an arithmetic number, because the mean of its divisors is an integer number (1078654).

2^2157307 is an apocalyptic number.

2157307 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157307 is an equidigital number, since it uses as much as digits as its factorization.

2157307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 2157307 is about 1468.7773827235. Note that the first 3 decimals coincide. The cubic root of 2157307 is about 129.2123378327.

The spelling of 2157307 in words is "two million, one hundred fifty-seven thousand, three hundred seven".