551564 has 12 divisors (see below), whose sum is σ = 1039584. Its totient is φ = 254544.

The previous prime is 551557. The next prime is 551569. The reversal of 551564 is 465155.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (551569) 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, 5252 + ... + 5355.

It is an arithmetic number, because the mean of its divisors is an integer number (86632).

2⁵⁵¹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

551564 is a deficient number, since it is larger than the sum of its proper divisors (488020).

551564 is a wasteful number, since it uses less digits than its factorization.

551564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10624 (or 10622 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 551564 is about 742.6735487413. The cubic root of 551564 is about 82.0097152875.

The spelling of 551564 in words is "five hundred fifty-one thousand, five hundred sixty-four".