285553 has 2 divisors, whose sum is σ = 285554. Its totient is φ = 285552.

The previous prime is 285539. The next prime is 285557. The reversal of 285553 is 355582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262144 + 23409 = 512^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 285553 - 2⁵ = 285521 is a prime.

It is not a weakly prime, because it can be changed into another prime (285557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142776 + 142777.

It is an arithmetic number, because the mean of its divisors is an integer number (142777).

2²⁸⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

285553 is a deficient number, since it is larger than the sum of its proper divisors (1).

285553 is an equidigital number, since it uses as much as digits as its factorization.

285553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6000, while the sum is 28.

The square root of 285553 is about 534.3715935564. The cubic root of 285553 is about 65.8509799763.

It can be divided in two parts, 285 and 553, that added together give a palindrome (838).

The spelling of 285553 in words is "two hundred eighty-five thousand, five hundred fifty-three".