55021142240 has 24 divisors (see below), whose sum is σ = 129987448920. Its totient is φ = 22008456832.

The previous prime is 55021142237. The next prime is 55021142251. The reversal of 55021142240 is 4224112055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171940910 + ... + 171941229.

It is an arithmetic number, because the mean of its divisors is an integer number (5416143705).

Almost surely, 2^55021142240 is an apocalyptic number.

It is an amenable number.

55021142240 is an abundant number, since it is smaller than the sum of its proper divisors (74966306680).

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

55021142240 is a wasteful number, since it uses less digits than its factorization.

55021142240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343882154 (or 343882146 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 55021142240 its reverse (4224112055), we get a palindrome (59245254295).

The spelling of 55021142240 in words is "fifty-five billion, twenty-one million, one hundred forty-two thousand, two hundred forty".