55067550 has 96 divisors (see below), whose sum is σ = 142705152. Its totient is φ = 14042880.

The previous prime is 55067533. The next prime is 55067557. The reversal of 55067550 is 5576055.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55067557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 514597 + ... + 514703.

It is an arithmetic number, because the mean of its divisors is an integer number (1486512).

Almost surely, 2^55067550 is an apocalyptic number.

55067550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55067550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71352576).

55067550 is an abundant number, since it is smaller than the sum of its proper divisors (87637602).

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

55067550 is a wasteful number, since it uses less digits than its factorization.

55067550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 33.

The square root of 55067550 is about 7420.7513096721. The cubic root of 55067550 is about 380.4508729497.

It can be divided in two parts, 550675 and 50, that added together give a triangular number (550725 = T₁₀₄₉).

The spelling of 55067550 in words is "fifty-five million, sixty-seven thousand, five hundred fifty".