55428503 has 4 divisors (see below), whose sum is σ = 59692248. Its totient is φ = 51164760.

The previous prime is 55428487. The next prime is 55428521. The reversal of 55428503 is 30582455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30582455 = 5 ⋅6116491.

It is a cyclic number.

It is not a de Polignac number, because 55428503 - 2⁴ = 55428487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55428503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55428103) 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, 2131853 + ... + 2131878.

It is an arithmetic number, because the mean of its divisors is an integer number (14923062).

Almost surely, 2^55428503 is an apocalyptic number.

55428503 is a deficient number, since it is larger than the sum of its proper divisors (4263745).

55428503 is a wasteful number, since it uses less digits than its factorization.

55428503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263744.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 55428503 is about 7445.0321020127. The cubic root of 55428503 is about 381.2803144219.

The spelling of 55428503 in words is "fifty-five million, four hundred twenty-eight thousand, five hundred three".