222420987 has 6 divisors (see below), whose sum is σ = 321274772. Its totient is φ = 148280652.

The previous prime is 222420977. The next prime is 222421021. The reversal of 222420987 is 789024222.

It is a happy number.

222420987 is a `hidden beast` number, since 222 + 420 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 222420987 - 2¹² = 222416891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222420977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12356713 + ... + 12356730.

Almost surely, 2^222420987 is an apocalyptic number.

222420987 is a deficient number, since it is larger than the sum of its proper divisors (98853785).

222420987 is a wasteful number, since it uses less digits than its factorization.

222420987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24713449 (or 24713446 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 222420987 is about 14913.7851332249. The cubic root of 222420987 is about 605.8874002472.

The spelling of 222420987 in words is "two hundred twenty-two million, four hundred twenty thousand, nine hundred eighty-seven".