427555221 has 8 divisors (see below), whose sum is σ = 570329760. Its totient is φ = 284908752.

The previous prime is 427555213. The next prime is 427555229. The reversal of 427555221 is 122555724.

It is an interprime number because it is at equal distance from previous prime (427555213) and next prime (427555229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427555221 - 2³ = 427555213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427555229) 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 7 ways as a sum of consecutive naturals, for example, 23935 + ... + 37788.

It is an arithmetic number, because the mean of its divisors is an integer number (71291220).

Almost surely, 2^427555221 is an apocalyptic number.

It is an amenable number.

427555221 is a deficient number, since it is larger than the sum of its proper divisors (142774539).

427555221 is a wasteful number, since it uses less digits than its factorization.

427555221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64035.

The product of its digits is 28000, while the sum is 33.

The square root of 427555221 is about 20677.4084691482. The cubic root of 427555221 is about 753.3510617690.

The spelling of 427555221 in words is "four hundred twenty-seven million, five hundred fifty-five thousand, two hundred twenty-one".