213732503 has 2 divisors, whose sum is σ = 213732504. Its totient is φ = 213732502.

The previous prime is 213732499. The next prime is 213732509. The reversal of 213732503 is 305237312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213732503 - 2² = 213732499 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213732509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106866251 + 106866252.

It is an arithmetic number, because the mean of its divisors is an integer number (106866252).

Almost surely, 2^213732503 is an apocalyptic number.

213732503 is a deficient number, since it is larger than the sum of its proper divisors (1).

213732503 is an equidigital number, since it uses as much as digits as its factorization.

213732503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 213732503 is about 14619.5931201932. The cubic root of 213732503 is about 597.8930758519.

Adding to 213732503 its reverse (305237312), we get a palindrome (518969815).

The spelling of 213732503 in words is "two hundred thirteen million, seven hundred thirty-two thousand, five hundred three".