55140000 has 120 divisors (see below), whose sum is σ = 181067040. Its totient is φ = 14688000.

The previous prime is 55139969. The next prime is 55140011. The reversal of 55140000 is 4155.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59541 + ... + 60459.

It is an arithmetic number, because the mean of its divisors is an integer number (1508892).

Almost surely, 2^55140000 is an apocalyptic number.

55140000 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 55140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90533520).

55140000 is an abundant number, since it is smaller than the sum of its proper divisors (125927040).

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

55140000 is an equidigital number, since it uses as much as digits as its factorization.

55140000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 55140000 is about 7425.6312862948. The cubic root of 55140000 is about 380.6176474323.

Adding to 55140000 its reverse (4155), we get a palindrome (55144155).

The spelling of 55140000 in words is "fifty-five million, one hundred forty thousand".