551245144220 has 48 divisors (see below), whose sum is σ = 1160093140416. Its totient is φ = 220026240000.

The previous prime is 551245144193. The next prime is 551245144243. The reversal of 551245144220 is 22441542155.

It is a super-2 number, since 2×551245144220² (a number of 24 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 15 ways as a sum of consecutive naturals, for example, 57893060 + ... + 57902580.

It is an arithmetic number, because the mean of its divisors is an integer number (24168607092).

Almost surely, 2^551245144220 is an apocalyptic number.

It is an amenable number.

551245144220 is an abundant number, since it is smaller than the sum of its proper divisors (608847996196).

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

551245144220 is a wasteful number, since it uses less digits than its factorization.

551245144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15422 (or 15420 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 551245144220 its reverse (22441542155), we get a palindrome (573686686375).

The spelling of 551245144220 in words is "five hundred fifty-one billion, two hundred forty-five million, one hundred forty-four thousand, two hundred twenty".