427271881 has 4 divisors (see below), whose sum is σ = 427317264. Its totient is φ = 427226500.

The previous prime is 427271869. The next prime is 427271891. The reversal of 427271881 is 188172724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 427271881 - 2¹¹ = 427269833 is a prime.

It is a super-2 number, since 2×427271881² = 365122520586556322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427271891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695 + ... + 29356.

It is an arithmetic number, because the mean of its divisors is an integer number (106829316).

Almost surely, 2^427271881 is an apocalyptic number.

It is an amenable number.

427271881 is a deficient number, since it is larger than the sum of its proper divisors (45383).

427271881 is a wasteful number, since it uses less digits than its factorization.

427271881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45382.

The product of its digits is 50176, while the sum is 40.

The square root of 427271881 is about 20670.5558947988. Note that the first 3 decimals coincide. The cubic root of 427271881 is about 753.1846102413.

The spelling of 427271881 in words is "four hundred twenty-seven million, two hundred seventy-one thousand, eight hundred eighty-one".