55017400 has 24 divisors (see below), whose sum is σ = 127915920. Its totient is φ = 22006880.

The previous prime is 55017383. The next prime is 55017433. The reversal of 55017400 is 471055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137344 + ... + 137743.

It is an arithmetic number, because the mean of its divisors is an integer number (5329830).

Almost surely, 2^55017400 is an apocalyptic number.

55017400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55017400 is an abundant number, since it is smaller than the sum of its proper divisors (72898520).

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

55017400 is a wasteful number, since it uses less digits than its factorization.

55017400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275103 (or 275094 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 55017400 is about 7417.3715020889. The cubic root of 55017400 is about 380.3353457101.

Adding to 55017400 its reverse (471055), we get a palindrome (55488455).

The spelling of 55017400 in words is "fifty-five million, seventeen thousand, four hundred".