2157303 has 4 divisors (see below), whose sum is σ = 2876408. Its totient is φ = 1438200.

The previous prime is 2157301. The next prime is 2157307. The reversal of 2157303 is 3037512.

It is a happy number.

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

It is not a de Polignac number, because 2157303 - 2¹ = 2157301 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 359548 + ... + 359553.

It is an arithmetic number, because the mean of its divisors is an integer number (719102).

2^2157303 is an apocalyptic number.

2157303 is a deficient number, since it is larger than the sum of its proper divisors (719105).

2157303 is an equidigital number, since it uses as much as digits as its factorization.

2157303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719104.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 2157303 is about 1468.7760210461. The cubic root of 2157303 is about 129.2122579723.

The spelling of 2157303 in words is "two million, one hundred fifty-seven thousand, three hundred three".