551280 has 40 divisors (see below), whose sum is σ = 1709712. Its totient is φ = 146944.

The previous prime is 551269. The next prime is 551281. The reversal of 551280 is 82155.

551280 = T₅ + T₆ + ... + T₁₄₈.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551281) 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, 909 + ... + 1388.

2⁵⁵¹²⁸⁰ is an apocalyptic number.

It is an amenable number.

551280 is an abundant number, since it is smaller than the sum of its proper divisors (1158432).

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

551280 is a wasteful number, since it uses less digits than its factorization.

551280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 551280 is about 742.4823230219. The cubic root of 551280 is about 81.9956372852.

The spelling of 551280 in words is "five hundred fifty-one thousand, two hundred eighty".