288625081 has 4 divisors (see below), whose sum is σ = 298577700. Its totient is φ = 278672464.

The previous prime is 288625063. The next prime is 288625187. The reversal of 288625081 is 180526882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222755625 + 65869456 = 14925^2 + 8116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288625081 is a prime.

It is a super-2 number, since 2×288625081² = 166608874764513122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288625061) 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, 4976266 + ... + 4976323.

It is an arithmetic number, because the mean of its divisors is an integer number (74644425).

Almost surely, 2^288625081 is an apocalyptic number.

It is an amenable number.

288625081 is a deficient number, since it is larger than the sum of its proper divisors (9952619).

288625081 is an equidigital number, since it uses as much as digits as its factorization.

288625081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952618.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 288625081 is about 16988.9693919319. The cubic root of 288625081 is about 660.8628758335.

The spelling of 288625081 in words is "two hundred eighty-eight million, six hundred twenty-five thousand, eighty-one".