220241647 has 4 divisors (see below), whose sum is σ = 233197056. Its totient is φ = 207286240.

The previous prime is 220241621. The next prime is 220241669. The reversal of 220241647 is 746142022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746142022 = 2 ⋅373071011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220241647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220241617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6477679 + ... + 6477712.

It is an arithmetic number, because the mean of its divisors is an integer number (58299264).

Almost surely, 2^220241647 is an apocalyptic number.

220241647 is a deficient number, since it is larger than the sum of its proper divisors (12955409).

220241647 is a wasteful number, since it uses less digits than its factorization.

220241647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12955408.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 220241647 is about 14840.5406572672. The cubic root of 220241647 is about 603.9020196533.

Adding to 220241647 its reverse (746142022), we get a palindrome (966383669).

The spelling of 220241647 in words is "two hundred twenty million, two hundred forty-one thousand, six hundred forty-seven".