55136503 has 4 divisors (see below), whose sum is σ = 56071080. Its totient is φ = 54201928.

The previous prime is 55136467. The next prime is 55136519. The reversal of 55136503 is 30563155.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55136503 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 (55136533) 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, 467200 + ... + 467317.

It is an arithmetic number, because the mean of its divisors is an integer number (14017770).

Almost surely, 2^55136503 is an apocalyptic number.

55136503 is a deficient number, since it is larger than the sum of its proper divisors (934577).

55136503 is an equidigital number, since it uses as much as digits as its factorization.

55136503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934576.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 55136503 is about 7425.3958143657. The cubic root of 55136503 is about 380.6096009563.

Adding to 55136503 its reverse (30563155), we get a palindrome (85699658).

The spelling of 55136503 in words is "fifty-five million, one hundred thirty-six thousand, five hundred three".