55185057224 has 128 divisors (see below), whose sum is σ = 120950928000. Its totient is φ = 23340441600.

The previous prime is 55185057089. The next prime is 55185057241. The reversal of 55185057224 is 42275058155.

It is a Cunningham number, because it is equal to 234915²-1.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34296932 + ... + 34298540.

It is an arithmetic number, because the mean of its divisors is an integer number (944929125).

Almost surely, 2^55185057224 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 55185057224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60475464000).

55185057224 is an abundant number, since it is smaller than the sum of its proper divisors (65765870776).

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

55185057224 is a wasteful number, since it uses less digits than its factorization.

55185057224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1995 counting only the distinct ones).

The product of its (nonzero) digits is 560000, while the sum is 44.

The spelling of 55185057224 in words is "fifty-five billion, one hundred eighty-five million, fifty-seven thousand, two hundred twenty-four".