220655387 has 2 divisors, whose sum is σ = 220655388. Its totient is φ = 220655386.

The previous prime is 220655363. The next prime is 220655389. The reversal of 220655387 is 783556022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220655387 - 2¹⁶ = 220589851 is a prime.

Together with 220655389, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220655387.

It is not a weakly prime, because it can be changed into another prime (220655389) 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, 110327693 + 110327694.

It is an arithmetic number, because the mean of its divisors is an integer number (110327694).

Almost surely, 2^220655387 is an apocalyptic number.

220655387 is a deficient number, since it is larger than the sum of its proper divisors (1).

220655387 is an equidigital number, since it uses as much as digits as its factorization.

220655387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 220655387 is about 14854.4736359118. The cubic root of 220655387 is about 604.2799411000.

The spelling of 220655387 in words is "two hundred twenty million, six hundred fifty-five thousand, three hundred eighty-seven".