551443380 has 24 divisors (see below), whose sum is σ = 1544041632. Its totient is φ = 147051552.

The previous prime is 551443379. The next prime is 551443397. The reversal of 551443380 is 83344155.

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, 4595302 + ... + 4595421.

It is an arithmetic number, because the mean of its divisors is an integer number (64335068).

Almost surely, 2^551443380 is an apocalyptic number.

It is an amenable number.

551443380 is an abundant number, since it is smaller than the sum of its proper divisors (992598252).

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

551443380 is a wasteful number, since it uses less digits than its factorization.

551443380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190735 (or 9190733 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 551443380 is about 23482.8316009803. The cubic root of 551443380 is about 820.0373669270.

The spelling of 551443380 in words is "five hundred fifty-one million, four hundred forty-three thousand, three hundred eighty".