55071880 has 64 divisors (see below), whose sum is σ = 131414400. Its totient is φ = 20712960.

The previous prime is 55071871. The next prime is 55071889. The reversal of 55071880 is 8817055.

It is an interprime number because it is at equal distance from previous prime (55071871) and next prime (55071889).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55071889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176925 + ... + 177235.

It is an arithmetic number, because the mean of its divisors is an integer number (2053350).

Almost surely, 2^55071880 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 55071880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65707200).

55071880 is an abundant number, since it is smaller than the sum of its proper divisors (76342520).

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

55071880 is a wasteful number, since it uses less digits than its factorization.

55071880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 55071880 is about 7421.0430533719. The cubic root of 55071880 is about 380.4608443945.

The spelling of 55071880 in words is "fifty-five million, seventy-one thousand, eight hundred eighty".