55220322540 has 96 divisors (see below), whose sum is σ = 155238519744. Its totient is φ = 14666342400.

The previous prime is 55220322511. The next prime is 55220322559. The reversal of 55220322540 is 4522302255.

55220322540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 55220322498 and 55220322507.

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, 21099312 + ... + 21101928.

It is an arithmetic number, because the mean of its divisors is an integer number (1617067914).

Almost surely, 2^55220322540 is an apocalyptic number.

It is an amenable number.

55220322540 is an abundant number, since it is smaller than the sum of its proper divisors (100018197204).

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

55220322540 is a wasteful number, since it uses less digits than its factorization.

55220322540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907 (or 3905 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 55220322540 its reverse (4522302255), we get a palindrome (59742624795).

The spelling of 55220322540 in words is "fifty-five billion, two hundred twenty million, three hundred twenty-two thousand, five hundred forty".