55131055320 has 128 divisors (see below), whose sum is σ = 180566807040. Its totient is φ = 13354890240.

The previous prime is 55131055313. The next prime is 55131055337. The reversal of 55131055320 is 2355013155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1789164 + ... + 1819716.

It is an arithmetic number, because the mean of its divisors is an integer number (1410678180).

Almost surely, 2^55131055320 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 55131055320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90283403520).

55131055320 is an abundant number, since it is smaller than the sum of its proper divisors (125435751720).

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

55131055320 is a wasteful number, since it uses less digits than its factorization.

55131055320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31945 (or 31941 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

Adding to 55131055320 its reverse (2355013155), we get a palindrome (57486068475).

The spelling of 55131055320 in words is "fifty-five billion, one hundred thirty-one million, fifty-five thousand, three hundred twenty".