55255503 has 16 divisors (see below), whose sum is σ = 76377600. Its totient is φ = 35509056.

The previous prime is 55255489. The next prime is 55255517. The reversal of 55255503 is 30555255.

It is an interprime number because it is at equal distance from previous prime (55255489) and next prime (55255517).

It is a de Polignac number, because none of the positive numbers 2^k-55255503 is a prime.

It is a super-2 number, since 2×55255503² = 6106341223566018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55255573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6523 + ... + 12371.

It is an arithmetic number, because the mean of its divisors is an integer number (4773600).

Almost surely, 2^55255503 is an apocalyptic number.

55255503 is a deficient number, since it is larger than the sum of its proper divisors (21122097).

55255503 is a wasteful number, since it uses less digits than its factorization.

55255503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 55255503 is about 7433.4045362808. The cubic root of 55255503 is about 380.8832248679.

The spelling of 55255503 in words is "fifty-five million, two hundred fifty-five thousand, five hundred three".