427018221 has 24 divisors (see below), whose sum is σ = 723974784. Its totient is φ = 237414240.

The previous prime is 427018201. The next prime is 427018259. The reversal of 427018221 is 122810724.

427018221 is a `hidden beast` number, since 427 + 0 + 18 + 221 = 666.

It is not a de Polignac number, because 427018221 - 2¹⁵ = 426985453 is a prime.

It is a super-2 number, since 2×427018221² = 364689122132009682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427018201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89265 + ... + 93926.

It is an arithmetic number, because the mean of its divisors is an integer number (30165616).

Almost surely, 2^427018221 is an apocalyptic number.

It is an amenable number.

427018221 is a deficient number, since it is larger than the sum of its proper divisors (296956563).

427018221 is a wasteful number, since it uses less digits than its factorization.

427018221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183241 (or 183238 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 427018221 is about 20664.4192030650. The cubic root of 427018221 is about 753.0355321508.

Adding to 427018221 its reverse (122810724), we get a palindrome (549828945).

The spelling of 427018221 in words is "four hundred twenty-seven million, eighteen thousand, two hundred twenty-one".