55375000 has 56 divisors (see below), whose sum is σ = 130076460. Its totient is φ = 22100000.

The previous prime is 55374941. The next prime is 55375003. The reversal of 55375000 is 57355.

It is a happy number.

55375000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55375003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 124779 + ... + 125221.

Almost surely, 2^55375000 is an apocalyptic number.

55375000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55375000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65038230).

55375000 is an abundant number, since it is smaller than the sum of its proper divisors (74701460).

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

55375000 is an frugal number, since it uses more digits than its factorization.

55375000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 25.

The square root of 55375000 is about 7441.4380330686. The cubic root of 55375000 is about 381.1575965256.

The spelling of 55375000 in words is "fifty-five million, three hundred seventy-five thousand".