551505828 has 12 divisors (see below), whose sum is σ = 1286846960. Its totient is φ = 183835272.

The previous prime is 551505827. The next prime is 551505839. The reversal of 551505828 is 828505155.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (551505821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22979398 + ... + 22979421.

Almost surely, 2^551505828 is an apocalyptic number.

It is an amenable number.

551505828 is an abundant number, since it is smaller than the sum of its proper divisors (735341132).

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

551505828 is a wasteful number, since it uses less digits than its factorization.

551505828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45958826 (or 45958824 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 39.

The square root of 551505828 is about 23484.1612155938. The cubic root of 551505828 is about 820.0683207005.

The spelling of 551505828 in words is "five hundred fifty-one million, five hundred five thousand, eight hundred twenty-eight".