55551253220 has 24 divisors (see below), whose sum is σ = 116767420224. Its totient is φ = 22199589216.

The previous prime is 55551253201. The next prime is 55551253319. The reversal of 55551253220 is 2235215555.

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, 1285214 + ... + 1327733.

It is an arithmetic number, because the mean of its divisors is an integer number (4865309176).

Almost surely, 2^55551253220 is an apocalyptic number.

It is an amenable number.

55551253220 is an abundant number, since it is smaller than the sum of its proper divisors (61216167004).

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

55551253220 is a wasteful number, since it uses less digits than its factorization.

55551253220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614019 (or 2614017 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

Adding to 55551253220 its reverse (2235215555), we get a palindrome (57786468775).

The spelling of 55551253220 in words is "fifty-five billion, five hundred fifty-one million, two hundred fifty-three thousand, two hundred twenty".