55642503 has 16 divisors (see below), whose sum is σ = 87713280. Its totient is φ = 30698976.

The previous prime is 55642423. The next prime is 55642511. The reversal of 55642503 is 30524655.

It is not a de Polignac number, because 55642503 - 2²¹ = 53545351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55642523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45075 + ... + 46292.

It is an arithmetic number, because the mean of its divisors is an integer number (5482080).

Almost surely, 2^55642503 is an apocalyptic number.

55642503 is a deficient number, since it is larger than the sum of its proper divisors (32070777).

55642503 is a wasteful number, since it uses less digits than its factorization.

55642503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91406.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 55642503 is about 7459.3902565826. The cubic root of 55642503 is about 381.7703703841.

The spelling of 55642503 in words is "fifty-five million, six hundred forty-two thousand, five hundred three".