55154640 has 80 divisors (see below), whose sum is σ = 173203200. Its totient is φ = 14516736.

The previous prime is 55154633. The next prime is 55154651. The reversal of 55154640 is 4645155.

55154640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55154598 and 55154607.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 17506 + ... + 20414.

It is an arithmetic number, because the mean of its divisors is an integer number (2165040).

Almost surely, 2^55154640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55154640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86601600).

55154640 is an abundant number, since it is smaller than the sum of its proper divisors (118048560).

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

55154640 is a wasteful number, since it uses less digits than its factorization.

55154640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 55154640 is about 7426.6169956448. The cubic root of 55154640 is about 380.6513298726.

Adding to 55154640 its reverse (4645155), we get a palindrome (59799795).

The spelling of 55154640 in words is "fifty-five million, one hundred fifty-four thousand, six hundred forty".