55317503 has 2 divisors, whose sum is σ = 55317504. Its totient is φ = 55317502.

The previous prime is 55317497. The next prime is 55317511. The reversal of 55317503 is 30571355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55317503 - 2¹⁶ = 55251967 is a prime.

It is a super-2 number, since 2×55317503² = 6120052276310018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55317103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27658751 + 27658752.

It is an arithmetic number, because the mean of its divisors is an integer number (27658752).

Almost surely, 2^55317503 is an apocalyptic number.

55317503 is a deficient number, since it is larger than the sum of its proper divisors (1).

55317503 is an equidigital number, since it uses as much as digits as its factorization.

55317503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 55317503 is about 7437.5737307270. The cubic root of 55317503 is about 381.0256295864.

Adding to 55317503 its reverse (30571355), we get a palindrome (85888858).

The spelling of 55317503 in words is "fifty-five million, three hundred seventeen thousand, five hundred three".