222128487 has 112 divisors (see below), whose sum is σ = 419712000. Its totient is φ = 114633792.

The previous prime is 222128479. The next prime is 222128513. The reversal of 222128487 is 784821222.

It is not a de Polignac number, because 222128487 - 2³ = 222128479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222128437) 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 in 111 ways as a sum of consecutive naturals, for example, 2811714 + ... + 2811792.

Almost surely, 2^222128487 is an apocalyptic number.

222128487 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

222128487 is a deficient number, since it is larger than the sum of its proper divisors (197583513).

222128487 is an equidigital number, since it uses as much as digits as its factorization.

222128487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 137 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 222128487 is about 14903.9755434582. The cubic root of 222128487 is about 605.6216881990.

The spelling of 222128487 in words is "two hundred twenty-two million, one hundred twenty-eight thousand, four hundred eighty-seven".