287561225 has 48 divisors (see below), whose sum is σ = 424080000. Its totient is φ = 189319680.

The previous prime is 287561201. The next prime is 287561237. The reversal of 287561225 is 522165782.

It is not a de Polignac number, because 287561225 - 2⁸ = 287560969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 576026 + ... + 576524.

It is an arithmetic number, because the mean of its divisors is an integer number (8835000).

Almost surely, 2^287561225 is an apocalyptic number.

287561225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

287561225 is a deficient number, since it is larger than the sum of its proper divisors (136518775).

287561225 is a wasteful number, since it uses less digits than its factorization.

287561225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 637 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 287561225 is about 16957.6302884572. The cubic root of 287561225 is about 660.0499082247.

The spelling of 287561225 in words is "two hundred eighty-seven million, five hundred sixty-one thousand, two hundred twenty-five".