287225617 has 8 divisors (see below), whose sum is σ = 328361600. Its totient is φ = 246115584.

The previous prime is 287225611. The next prime is 287225621. The reversal of 287225617 is 716522782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287225617 is a prime.

It is a super-2 number, since 2×287225617² = 164997110122061378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 287225617.

It is not an unprimeable number, because it can be changed into a prime (287225611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34609 + ... + 42097.

It is an arithmetic number, because the mean of its divisors is an integer number (41045200).

Almost surely, 2^287225617 is an apocalyptic number.

It is an amenable number.

287225617 is a deficient number, since it is larger than the sum of its proper divisors (41135983).

287225617 is an equidigital number, since it uses as much as digits as its factorization.

287225617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12975.

The product of its digits is 94080, while the sum is 40.

The square root of 287225617 is about 16947.7319131499. The cubic root of 287225617 is about 659.7930304506.

The spelling of 287225617 in words is "two hundred eighty-seven million, two hundred twenty-five thousand, six hundred seventeen".