55145552 has 80 divisors (see below), whose sum is σ = 141098112. Its totient is φ = 20213760.

The previous prime is 55145551. The next prime is 55145591. The reversal of 55145552 is 25554155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19628 + ... + 22260.

Almost surely, 2^55145552 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 55145552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70549056).

55145552 is an abundant number, since it is smaller than the sum of its proper divisors (85952560).

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

55145552 is a wasteful number, since it uses less digits than its factorization.

55145552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676 (or 2670 counting only the distinct ones).

The product of its digits is 25000, while the sum is 32.

The square root of 55145552 is about 7426.0051171542. The cubic root of 55145552 is about 380.6304216933.

The spelling of 55145552 in words is "fifty-five million, one hundred forty-five thousand, five hundred fifty-two".