225539987 has 2 divisors, whose sum is σ = 225539988. Its totient is φ = 225539986.

The previous prime is 225539983. The next prime is 225540019. The reversal of 225539987 is 789935522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225539987 - 2² = 225539983 is a prime.

It is a super-3 number, since 3×225539987³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225539983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112769993 + 112769994.

It is an arithmetic number, because the mean of its divisors is an integer number (112769994).

Almost surely, 2^225539987 is an apocalyptic number.

225539987 is a deficient number, since it is larger than the sum of its proper divisors (1).

225539987 is an equidigital number, since it uses as much as digits as its factorization.

225539987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 50.

The square root of 225539987 is about 15017.9887801263. The cubic root of 225539987 is about 608.7063752791.

The spelling of 225539987 in words is "two hundred twenty-five million, five hundred thirty-nine thousand, nine hundred eighty-seven".