215040503 has 2 divisors, whose sum is σ = 215040504. Its totient is φ = 215040502.

The previous prime is 215040479. The next prime is 215040509. The reversal of 215040503 is 305040512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215040503 - 2⁸ = 215040247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215040509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107520251 + 107520252.

It is an arithmetic number, because the mean of its divisors is an integer number (107520252).

Almost surely, 2^215040503 is an apocalyptic number.

215040503 is a deficient number, since it is larger than the sum of its proper divisors (1).

215040503 is an equidigital number, since it uses as much as digits as its factorization.

215040503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 215040503 is about 14664.2593744110. The cubic root of 215040503 is about 599.1102581030.

Subtracting 215040503 from its reverse (305040512), we obtain a palindrome (90000009).

The spelling of 215040503 in words is "two hundred fifteen million, forty thousand, five hundred three".