55050140 has 24 divisors (see below), whose sum is σ = 115834320. Its totient is φ = 21976448.

The previous prime is 55050139. The next prime is 55050143. The reversal of 55050140 is 4105055.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55050143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8816 + ... + 13704.

It is an arithmetic number, because the mean of its divisors is an integer number (4826430).

Almost surely, 2^55050140 is an apocalyptic number.

It is an amenable number.

55050140 is an abundant number, since it is smaller than the sum of its proper divisors (60784180).

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

55050140 is a wasteful number, since it uses less digits than its factorization.

55050140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461 (or 5459 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 55050140 is about 7419.5781551245. The cubic root of 55050140 is about 380.4107746350.

Adding to 55050140 its reverse (4105055), we get a palindrome (59155195).

The spelling of 55050140 in words is "fifty-five million, fifty thousand, one hundred forty".