551920816 has 40 divisors (see below), whose sum is σ = 1134302400. Its totient is φ = 259421760.

The previous prime is 551920813. The next prime is 551920819. The reversal of 551920816 is 618029155.

It is an interprime number because it is at equal distance from previous prime (551920813) and next prime (551920819).

It is not an unprimeable number, because it can be changed into a prime (551920813) 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, 32895 + ... + 46753.

It is an arithmetic number, because the mean of its divisors is an integer number (28357560).

Almost surely, 2^551920816 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 551920816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567151200).

551920816 is an abundant number, since it is smaller than the sum of its proper divisors (582381584).

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

551920816 is a wasteful number, since it uses less digits than its factorization.

551920816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14017 (or 14011 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 551920816 is about 23492.9950410755. The cubic root of 551920816 is about 820.2739596207.

It can be divided in two parts, 5519 and 20816, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 551920816 in words is "five hundred fifty-one million, nine hundred twenty thousand, eight hundred sixteen".