288532561 has 4 divisors (see below), whose sum is σ = 291333952. Its totient is φ = 285731172.

The previous prime is 288532553. The next prime is 288532579. The reversal of 288532561 is 165235882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 288532561 - 2³ = 288532553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288532591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400541 + ... + 1400746.

It is an arithmetic number, because the mean of its divisors is an integer number (72833488).

Almost surely, 2^288532561 is an apocalyptic number.

It is an amenable number.

288532561 is a deficient number, since it is larger than the sum of its proper divisors (2801391).

288532561 is a wasteful number, since it uses less digits than its factorization.

288532561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801390.

The product of its digits is 115200, while the sum is 40.

The square root of 288532561 is about 16986.2462304065. The cubic root of 288532561 is about 660.7922541497.

The spelling of 288532561 in words is "two hundred eighty-eight million, five hundred thirty-two thousand, five hundred sixty-one".