220512947 has 2 divisors, whose sum is σ = 220512948. Its totient is φ = 220512946.

The previous prime is 220512931. The next prime is 220512977. The reversal of 220512947 is 749215022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220512947 - 2⁴ = 220512931 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220512907) 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, 110256473 + 110256474.

It is an arithmetic number, because the mean of its divisors is an integer number (110256474).

Almost surely, 2^220512947 is an apocalyptic number.

220512947 is a deficient number, since it is larger than the sum of its proper divisors (1).

220512947 is an equidigital number, since it uses as much as digits as its factorization.

220512947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 220512947 is about 14849.6783466848. The cubic root of 220512947 is about 604.1498858682.

Adding to 220512947 its reverse (749215022), we get a palindrome (969727969).

The spelling of 220512947 in words is "two hundred twenty million, five hundred twelve thousand, nine hundred forty-seven".