55438503 has 8 divisors (see below), whose sum is σ = 74185968. Its totient is φ = 36825024.

The previous prime is 55438501. The next prime is 55438511. The reversal of 55438503 is 30583455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55438503 - 2¹ = 55438501 is a prime.

It is a super-2 number, since 2×55438503² = 6146855229762018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55438501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32526 + ... + 34187.

It is an arithmetic number, because the mean of its divisors is an integer number (9273246).

Almost surely, 2^55438503 is an apocalyptic number.

55438503 is a deficient number, since it is larger than the sum of its proper divisors (18747465).

55438503 is a wasteful number, since it uses less digits than its factorization.

55438503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66993.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 55438503 is about 7445.7036605011. The cubic root of 55438503 is about 381.3032423000.

The spelling of 55438503 in words is "fifty-five million, four hundred thirty-eight thousand, five hundred three".