55388003 has 4 divisors (see below), whose sum is σ = 60423288. Its totient is φ = 50352720.

The previous prime is 55387987. The next prime is 55388009. The reversal of 55388003 is 30088355.

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

It is not a de Polignac number, because 55388003 - 2⁴ = 55387987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55388009) 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, 2517626 + ... + 2517647.

It is an arithmetic number, because the mean of its divisors is an integer number (15105822).

Almost surely, 2^55388003 is an apocalyptic number.

55388003 is a deficient number, since it is larger than the sum of its proper divisors (5035285).

55388003 is a wasteful number, since it uses less digits than its factorization.

55388003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035284.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 55388003 is about 7442.3116704422. The cubic root of 55388003 is about 381.1874283050.

The spelling of 55388003 in words is "fifty-five million, three hundred eighty-eight thousand, three".