55517120 has 28 divisors (see below), whose sum is σ = 132200904. Its totient is φ = 22206720.

The previous prime is 55517093. The next prime is 55517141. The reversal of 55517120 is 2171555.

It is a happy number.

It is a super-3 number, since 3×55517120³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 55517120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86426 + ... + 87065.

Almost surely, 2^55517120 is an apocalyptic number.

It is an amenable number.

55517120 is an abundant number, since it is smaller than the sum of its proper divisors (76683784).

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

55517120 is a wasteful number, since it uses less digits than its factorization.

55517120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173508 (or 173498 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 55517120 is about 7450.9811434468. The cubic root of 55517120 is about 381.4833984280.

Adding to 55517120 its reverse (2171555), we get a palindrome (57688675).

The spelling of 55517120 in words is "fifty-five million, five hundred seventeen thousand, one hundred twenty".