55163500 has 48 divisors (see below), whose sum is σ = 137696832. Its totient is φ = 18912000.

The previous prime is 55163447. The next prime is 55163501. The reversal of 55163500 is 536155.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (55163501) 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, 4381 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (2868684).

Almost surely, 2^55163500 is an apocalyptic number.

55163500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55163500 is an abundant number, since it is smaller than the sum of its proper divisors (82533332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55163500 is a wasteful number, since it uses less digits than its factorization.

55163500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15787 (or 15775 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 55163500 is about 7427.2134747831. The cubic root of 55163500 is about 380.6717112960.

Adding to 55163500 its reverse (536155), we get a palindrome (55699655).

The spelling of 55163500 in words is "fifty-five million, one hundred sixty-three thousand, five hundred".