551722920 has 128 divisors (see below), whose sum is σ = 1898208000. Its totient is φ = 125669376.

The previous prime is 551722907. The next prime is 551722921. The reversal of 551722920 is 29227155.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (551722921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282106 + ... + 284054.

It is an arithmetic number, because the mean of its divisors is an integer number (14829750).

Almost surely, 2^551722920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551722920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949104000).

551722920 is an abundant number, since it is smaller than the sum of its proper divisors (1346485080).

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

551722920 is a wasteful number, since it uses less digits than its factorization.

551722920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 551722920 is about 23488.7828548011. The cubic root of 551722920 is about 820.1759091177.

The spelling of 551722920 in words is "five hundred fifty-one million, seven hundred twenty-two thousand, nine hundred twenty".