551215424420 has 24 divisors (see below), whose sum is σ = 1157756316864. Its totient is φ = 220447326816.

The previous prime is 551215424411. The next prime is 551215424423. The reversal of 551215424420 is 24424512155.

It is not an unprimeable number, because it can be changed into a prime (551215424423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311184 + ... + 2538503.

It is an arithmetic number, because the mean of its divisors is an integer number (48239846536).

Almost surely, 2^551215424420 is an apocalyptic number.

It is an amenable number.

551215424420 is an abundant number, since it is smaller than the sum of its proper divisors (606540892444).

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

551215424420 is a wasteful number, since it uses less digits than its factorization.

551215424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855379 (or 4855377 counting only the distinct ones).

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

Adding to 551215424420 its reverse (24424512155), we get a palindrome (575639936575).

The spelling of 551215424420 in words is "five hundred fifty-one billion, two hundred fifteen million, four hundred twenty-four thousand, four hundred twenty".