55821272140 has 24 divisors (see below), whose sum is σ = 117229301280. Its totient is φ = 22327627008.

The previous prime is 55821272123. The next prime is 55821272141. The reversal of 55821272140 is 4127212855.

It is a happy number.

55821272140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55821272140.

It is not an unprimeable number, because it can be changed into a prime (55821272141) 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, 752769 + ... + 823591.

It is an arithmetic number, because the mean of its divisors is an integer number (4884554220).

Almost surely, 2^55821272140 is an apocalyptic number.

It is an amenable number.

55821272140 is an abundant number, since it is smaller than the sum of its proper divisors (61408029140).

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

55821272140 is a wasteful number, since it uses less digits than its factorization.

55821272140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110241 (or 110239 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

Adding to 55821272140 its reverse (4127212855), we get a palindrome (59948484995).

The spelling of 55821272140 in words is "fifty-five billion, eight hundred twenty-one million, two hundred seventy-two thousand, one hundred forty".