55115721332 has 24 divisors (see below), whose sum is σ = 110243602560. Its totient is φ = 23618417760.

The previous prime is 55115721251. The next prime is 55115721337. The reversal of 55115721332 is 23312751155.

55115721332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55115721292 and 55115721301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55115721337) 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, 161582 + ... + 369242.

It is an arithmetic number, because the mean of its divisors is an integer number (4593483440).

Almost surely, 2^55115721332 is an apocalyptic number.

It is an amenable number.

55115721332 is an abundant number, since it is smaller than the sum of its proper divisors (55127881228).

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

55115721332 is a wasteful number, since it uses less digits than its factorization.

55115721332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217151 (or 217149 counting only the distinct ones).

The product of its digits is 31500, while the sum is 35.

The spelling of 55115721332 in words is "fifty-five billion, one hundred fifteen million, seven hundred twenty-one thousand, three hundred thirty-two".