55113040 has 80 divisors (see below), whose sum is σ = 134562816. Its totient is φ = 20966400.

The previous prime is 55113013. The next prime is 55113041. The reversal of 55113040 is 4031155.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 55112999 and 55113017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55113041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175924 + ... + 176236.

Almost surely, 2^55113040 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 55113040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67281408).

55113040 is an abundant number, since it is smaller than the sum of its proper divisors (79449776).

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

55113040 is a wasteful number, since it uses less digits than its factorization.

55113040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55113040 is about 7423.8157304718. The cubic root of 55113040 is about 380.5556046041. Note that the first 3 decimals are identical.

Adding to 55113040 its reverse (4031155), we get a palindrome (59144195).

The spelling of 55113040 in words is "fifty-five million, one hundred thirteen thousand, forty".