55040120 has 16 divisors (see below), whose sum is σ = 123840360. Its totient is φ = 22016032.

The previous prime is 55040119. The next prime is 55040147. The reversal of 55040120 is 2104055.

It is a super-2 number, since 2×55040120² = 6058829619228800, which contains 22 as substring.

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, 687962 + ... + 688041.

Almost surely, 2^55040120 is an apocalyptic number.

It is an amenable number.

55040120 is an abundant number, since it is smaller than the sum of its proper divisors (68800240).

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

55040120 is a wasteful number, since it uses less digits than its factorization.

55040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376014 (or 1376010 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55040120 is about 7418.9028838501. The cubic root of 55040120 is about 380.3876929665.

Adding to 55040120 its reverse (2104055), we get a palindrome (57144175).

The spelling of 55040120 in words is "fifty-five million, forty thousand, one hundred twenty".