2157713 has 4 divisors (see below), whose sum is σ = 2160948. Its totient is φ = 2154480.

The previous prime is 2157709. The next prime is 2157721. The reversal of 2157713 is 3177512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 976144 + 1181569 = 988^2 + 1087^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157713 - 2² = 2157709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157733) 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, 206 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (540237).

2^2157713 is an apocalyptic number.

It is an amenable number.

2157713 is a deficient number, since it is larger than the sum of its proper divisors (3235).

2157713 is an equidigital number, since it uses as much as digits as its factorization.

2157713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234.

The product of its digits is 1470, while the sum is 26.

The square root of 2157713 is about 1468.9155864106. The cubic root of 2157713 is about 129.2204431415.

The spelling of 2157713 in words is "two million, one hundred fifty-seven thousand, seven hundred thirteen".