551403216 has 240 divisors, whose sum is σ = 1966124160. Its totient is φ = 140313600.

The previous prime is 551403179. The next prime is 551403241. The reversal of 551403216 is 612304155.

It is a self number, because there is not a number n which added to its sum of digits gives 551403216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379291 + ... + 380741.

It is an arithmetic number, because the mean of its divisors is an integer number (8192184).

Almost surely, 2^551403216 is an apocalyptic number.

551403216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551403216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983062080).

551403216 is an abundant number, since it is smaller than the sum of its proper divisors (1414720944).

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

551403216 is a wasteful number, since it uses less digits than its factorization.

551403216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 551403216 is about 23481.9764074492. The cubic root of 551403216 is about 820.0174574907.

The spelling of 551403216 in words is "five hundred fifty-one million, four hundred three thousand, two hundred sixteen".