228427599481 has 3 divisors (see below), whose sum is σ = 228428077423. Its totient is φ = 228427121540.

The previous prime is 228427599473. The next prime is 228427599497. The reversal of 228427599481 is 184995724822.

It is a happy number.

The square root of 228427599481 is 477941.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 197261227881 + 31166371600 = 444141^2 + 176540^2 .

It is not a de Polignac number, because 228427599481 - 2³ = 228427599473 is a prime.

It is a super-2 number, since 2×228427599481² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228427599431) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 238971 + ... + 716911.

Almost surely, 2^228427599481 is an apocalyptic number.

228427599481 is the 477941-st square number.

228427599481 is the 238971-st centered octagonal number.

It is an amenable number.

228427599481 is a deficient number, since it is larger than the sum of its proper divisors (477942).

228427599481 is an frugal number, since it uses more digits than its factorization.

228427599481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955882 (or 477941 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 61.

The spelling of 228427599481 in words is "two hundred twenty-eight billion, four hundred twenty-seven million, five hundred ninety-nine thousand, four hundred eighty-one".