55143000 has 192 divisors, whose sum is σ = 203692320. Its totient is φ = 13344000.

The previous prime is 55142999. The next prime is 55143041. The reversal of 55143000 is 34155.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98722 + ... + 99278.

Almost surely, 2^55143000 is an apocalyptic number.

55143000 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 55143000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101846160).

55143000 is an abundant number, since it is smaller than the sum of its proper divisors (148549320).

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

55143000 is a wasteful number, since it uses less digits than its factorization.

55143000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 55143000 is about 7425.8332865746. The cubic root of 55143000 is about 380.6245500573.

Adding to 55143000 its reverse (34155), we get a palindrome (55177155).

The spelling of 55143000 in words is "fifty-five million, one hundred forty-three thousand".