57216503 has 2 divisors, whose sum is σ = 57216504. Its totient is φ = 57216502.

The previous prime is 57216499. The next prime is 57216527. The reversal of 57216503 is 30561275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57216503 - 2² = 57216499 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57216553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28608251 + 28608252.

It is an arithmetic number, because the mean of its divisors is an integer number (28608252).

Almost surely, 2^57216503 is an apocalyptic number.

57216503 is a deficient number, since it is larger than the sum of its proper divisors (1).

57216503 is an equidigital number, since it uses as much as digits as its factorization.

57216503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 57216503 is about 7564.1591072637. The cubic root of 57216503 is about 385.3367560117.

Adding to 57216503 its reverse (30561275), we get a palindrome (87777778).

The spelling of 57216503 in words is "fifty-seven million, two hundred sixteen thousand, five hundred three".