55821272142 has 16 divisors (see below), whose sum is σ = 113472750672. Its totient is φ = 18302056320.

The previous prime is 55821272141. The next prime is 55821272173. The reversal of 55821272142 is 24127212855.

It is a self number, because there is not a number n which added to its sum of digits gives 55821272142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55821272141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76258203 + ... + 76258934.

It is an arithmetic number, because the mean of its divisors is an integer number (7092046917).

Almost surely, 2^55821272142 is an apocalyptic number.

55821272142 is an abundant number, since it is smaller than the sum of its proper divisors (57651478530).

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

55821272142 is a wasteful number, since it uses less digits than its factorization.

55821272142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152517203.

The product of its digits is 89600, while the sum is 39.

Adding to 55821272142 its reverse (24127212855), we get a palindrome (79948484997).

The spelling of 55821272142 in words is "fifty-five billion, eight hundred twenty-one million, two hundred seventy-two thousand, one hundred forty-two".