55220454140 has 48 divisors (see below), whose sum is σ = 116664256800. Its totient is φ = 21954991872.

The previous prime is 55220454109. The next prime is 55220454169. The reversal of 55220454140 is 4145402255.

It is a junction number, because it is equal to n+sod(n) for n = 55220454097 and 55220454106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309366 + ... + 2333154.

It is an arithmetic number, because the mean of its divisors is an integer number (2430505350).

Almost surely, 2^55220454140 is an apocalyptic number.

It is an amenable number.

55220454140 is an abundant number, since it is smaller than the sum of its proper divisors (61443802660).

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

55220454140 is a wasteful number, since it uses less digits than its factorization.

55220454140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24494 (or 24492 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 55220454140 its reverse (4145402255), we get a palindrome (59365856395).

The spelling of 55220454140 in words is "fifty-five billion, two hundred twenty million, four hundred fifty-four thousand, one hundred forty".