220948487 has 4 divisors (see below), whose sum is σ = 221525760. Its totient is φ = 220371216.

The previous prime is 220948459. The next prime is 220948489. The reversal of 220948487 is 784849022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220948487 is a prime.

It is a super-4 number, since 4×220948487⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220948489) 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 in 3 ways as a sum of consecutive naturals, for example, 288062 + ... + 288827.

It is an arithmetic number, because the mean of its divisors is an integer number (55381440).

Almost surely, 2^220948487 is an apocalyptic number.

220948487 is a deficient number, since it is larger than the sum of its proper divisors (577273).

220948487 is an equidigital number, since it uses as much as digits as its factorization.

220948487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577272.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 220948487 is about 14864.3360766635. The cubic root of 220948487 is about 604.5473808842.

The spelling of 220948487 in words is "two hundred twenty million, nine hundred forty-eight thousand, four hundred eighty-seven".