226781987 has 2 divisors, whose sum is σ = 226781988. Its totient is φ = 226781986.

The previous prime is 226781969. The next prime is 226782011. The reversal of 226781987 is 789187622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 226781987 - 2⁶ = 226781923 is a prime.

It is not a weakly prime, because it can be changed into another prime (226781927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113390993 + 113390994.

It is an arithmetic number, because the mean of its divisors is an integer number (113390994).

Almost surely, 2^226781987 is an apocalyptic number.

226781987 is a deficient number, since it is larger than the sum of its proper divisors (1).

226781987 is an equidigital number, since it uses as much as digits as its factorization.

226781987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 50.

The square root of 226781987 is about 15059.2824198233. The cubic root of 226781987 is about 609.8216687342.

The spelling of 226781987 in words is "two hundred twenty-six million, seven hundred eighty-one thousand, nine hundred eighty-seven".