55546140 has 192 divisors, whose sum is σ = 182891520. Its totient is φ = 12472320.

The previous prime is 55546133. The next prime is 55546147. The reversal of 55546140 is 4164555.

55546140 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55546133) and next prime (55546147).

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

55546140 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 55546098 and 55546107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55546147) 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 63 ways as a sum of consecutive naturals, for example, 782305 + ... + 782375.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^55546140 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 55546140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

55546140 is an abundant number, since it is smaller than the sum of its proper divisors (127345380).

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

55546140 is a wasteful number, since it uses less digits than its factorization.

55546140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

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

The square root of 55546140 is about 7452.9282835675. The cubic root of 55546140 is about 381.5498567255.

The spelling of 55546140 in words is "fifty-five million, five hundred forty-six thousand, one hundred forty".