2157503 has 2 divisors, whose sum is σ = 2157504. Its totient is φ = 2157502.

The previous prime is 2157499. The next prime is 2157511. The reversal of 2157503 is 3057512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157503 - 2² = 2157499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078751 + 1078752.

It is an arithmetic number, because the mean of its divisors is an integer number (1078752).

2^2157503 is an apocalyptic number.

2157503 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157503 is an equidigital number, since it uses as much as digits as its factorization.

2157503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 2157503 is about 1468.8441033684. The cubic root of 2157503 is about 129.2162508673.

Subtracting 2157503 from its reverse (3057512), we obtain a palindrome (900009).

The spelling of 2157503 in words is "two million, one hundred fifty-seven thousand, five hundred three".