228731671081 has 3 divisors (see below), whose sum is σ = 228732149341. Its totient is φ = 228731192822.

The previous prime is 228731671039. The next prime is 228731671097. The reversal of 228731671081 is 180176137822.

The square root of 228731671081 is 478259.

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 is not a de Polignac number, because 228731671081 - 2³¹ = 226584187433 is a prime.

It is a super-2 number, since 2×228731671081² (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 (228731671481) 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, 239130 + ... + 717388.

Almost surely, 2^228731671081 is an apocalyptic number.

228731671081 is the 478259-th square number.

228731671081 is the 239130-th centered octagonal number.

It is an amenable number.

228731671081 is a deficient number, since it is larger than the sum of its proper divisors (478260).

228731671081 is an frugal number, since it uses more digits than its factorization.

228731671081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956518 (or 478259 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 228731671081 in words is "two hundred twenty-eight billion, seven hundred thirty-one million, six hundred seventy-one thousand, eighty-one".