228366427129 has 9 divisors (see below), whose sum is σ = 230459748493. Its totient is φ = 226291963072.

The previous prime is 228366427127. The next prime is 228366427151. The reversal of 228366427129 is 921724663822.

The square root of 228366427129 is 477877.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1169298025 + 227197129104 = 34195^2 + 476652^2 .

It is not a de Polignac number, because 228366427129 - 2¹ = 228366427127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228366427127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53997987 + ... + 54002215.

Almost surely, 2^228366427129 is an apocalyptic number.

228366427129 is the 477877-th square number.

228366427129 is the 238939-th centered octagonal number.

It is an amenable number.

228366427129 is a deficient number, since it is larger than the sum of its proper divisors (2093321364).

228366427129 is an frugal number, since it uses more digits than its factorization.

228366427129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684 (or 4342 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 52.

The spelling of 228366427129 in words is "two hundred twenty-eight billion, three hundred sixty-six million, four hundred twenty-seven thousand, one hundred twenty-nine".