55203354515220 has 24 divisors (see below), whose sum is σ = 154569392642784. Its totient is φ = 14720894537376.

The previous prime is 55203354515203. The next prime is 55203354515249. The reversal of 55203354515220 is 2251545330255.

It is a super-2 number, since 2×55203354515220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460027954234 + ... + 460027954353.

It is an arithmetic number, because the mean of its divisors is an integer number (6440391360116).

Almost surely, 2^{55203354515220} is an apocalyptic number.

It is an amenable number.

55203354515220 is an abundant number, since it is smaller than the sum of its proper divisors (99366038127564).

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

55203354515220 is a wasteful number, since it uses less digits than its factorization.

55203354515220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920055908599 (or 920055908597 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 42.

Adding to 55203354515220 its reverse (2251545330255), we get a palindrome (57454899845475).

The spelling of 55203354515220 in words is "fifty-five trillion, two hundred three billion, three hundred fifty-four million, five hundred fifteen thousand, two hundred twenty".