285400553 has 2 divisors, whose sum is σ = 285400554. Its totient is φ = 285400552.

The previous prime is 285400543. The next prime is 285400559. The reversal of 285400553 is 355004582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270010624 + 15389929 = 16432^2 + 3923^2 .

It is a cyclic number.

It is not a de Polignac number, because 285400553 - 2¹⁰ = 285399529 is a prime.

It is not a weakly prime, because it can be changed into another prime (285400559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142700276 + 142700277.

It is an arithmetic number, because the mean of its divisors is an integer number (142700277).

Almost surely, 2^285400553 is an apocalyptic number.

It is an amenable number.

285400553 is a deficient number, since it is larger than the sum of its proper divisors (1).

285400553 is an equidigital number, since it uses as much as digits as its factorization.

285400553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 285400553 is about 16893.8022067266. The cubic root of 285400553 is about 658.3925936008.

The spelling of 285400553 in words is "two hundred eighty-five million, four hundred thousand, five hundred fifty-three".