55031760 has 240 divisors, whose sum is σ = 215879040. Its totient is φ = 12303360.

The previous prime is 55031759. The next prime is 55031777. The reversal of 55031760 is 6713055.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307351 + ... + 307529.

It is an arithmetic number, because the mean of its divisors is an integer number (899496).

Almost surely, 2^55031760 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 55031760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107939520).

55031760 is an abundant number, since it is smaller than the sum of its proper divisors (160847280).

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

55031760 is a wasteful number, since it uses less digits than its factorization.

55031760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 55031760 is about 7418.3394368282. The cubic root of 55031760 is about 380.3684330634.

The spelling of 55031760 in words is "fifty-five million, thirty-one thousand, seven hundred sixty".