551479320 has 384 divisors, whose sum is σ = 2267870400. Its totient is φ = 118444032.

The previous prime is 551479319. The next prime is 551479361. The reversal of 551479320 is 23974155.

551479320 is a `hidden beast` number, since 551 + 4 + 79 + 32 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 899334 + ... + 899946.

Almost surely, 2^551479320 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 551479320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133935200).

551479320 is an abundant number, since it is smaller than the sum of its proper divisors (1716391080).

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

551479320 is a wasteful number, since it uses less digits than its factorization.

551479320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 551479320 is about 23483.5968284247. The cubic root of 551479320 is about 820.0551816920.

The spelling of 551479320 in words is "five hundred fifty-one million, four hundred seventy-nine thousand, three hundred twenty".