53111503 has 4 divisors (see below), whose sum is σ = 53904280. Its totient is φ = 52318728.

The previous prime is 53111501. The next prime is 53111507. The reversal of 53111503 is 30511135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53111503 - 2¹ = 53111501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53111501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396288 + ... + 396421.

It is an arithmetic number, because the mean of its divisors is an integer number (13476070).

Almost surely, 2^53111503 is an apocalyptic number.

53111503 is a deficient number, since it is larger than the sum of its proper divisors (792777).

53111503 is an equidigital number, since it uses as much as digits as its factorization.

53111503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792776.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 53111503 is about 7287.7639231797. The cubic root of 53111503 is about 375.8918104866.

Adding to 53111503 its reverse (30511135), we get a palindrome (83622638).

It can be divided in two parts, 53 and 111503, that added together give a square (111556 = 334²).

The spelling of 53111503 in words is "fifty-three million, one hundred eleven thousand, five hundred three".