55245816 has 96 divisors (see below), whose sum is σ = 158614560. Its totient is φ = 17335296.

The previous prime is 55245791. The next prime is 55245823. The reversal of 55245816 is 61854255.

55245816 is a `hidden beast` number, since 55 + 24 + 581 + 6 = 666.

55245816 is a nontrivial binomial coefficient, being equal to C(10512, 2).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120660 + ... + 121116.

It is an arithmetic number, because the mean of its divisors is an integer number (1652235).

Almost surely, 2^55245816 is an apocalyptic number.

55245816 is the 10511-st triangular number and also the 5256-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55245816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79307280).

55245816 is an abundant number, since it is smaller than the sum of its proper divisors (103368744).

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

55245816 is a wasteful number, since it uses less digits than its factorization.

55245816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 558 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 55245816 is about 7432.7529220337. The cubic root of 55245816 is about 380.8609656585.

The spelling of 55245816 in words is "fifty-five million, two hundred forty-five thousand, eight hundred sixteen".