4247218881 has 28 divisors (see below), whose sum is σ = 6375425280. Its totient is φ = 2828140920.

The previous prime is 4247218861. The next prime is 4247218883. The reversal of 4247218881 is 1888127424.

4247218881 is a `hidden beast` number, since 424 + 7 + 218 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 4247218881 - 2⁵ = 4247218849 is a prime.

It is a super-2 number, since 2×4247218881² = 36077736446245784322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4247218883) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 719500 + ... + 725378.

It is an arithmetic number, because the mean of its divisors is an integer number (227693760).

Almost surely, 2^4247218881 is an apocalyptic number.

It is an amenable number.

4247218881 is a deficient number, since it is larger than the sum of its proper divisors (2128206399).

4247218881 is an frugal number, since it uses more digits than its factorization.

4247218881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888 (or 6873 counting only the distinct ones).

The product of its digits is 229376, while the sum is 45.

The square root of 4247218881 is about 65170.6903523355. The cubic root of 4247218881 is about 1619.4525001714.

The spelling of 4247218881 in words is "four billion, two hundred forty-seven million, two hundred eighteen thousand, eight hundred eighty-one".