228471138449 has 2 divisors, whose sum is σ = 228471138450. Its totient is φ = 228471138448.

The previous prime is 228471138437. The next prime is 228471138499. The reversal of 228471138449 is 944831174822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119080206400 + 109390932049 = 345080^2 + 330743^2 .

It is a cyclic number.

It is not a de Polignac number, because 228471138449 - 2²⁸ = 228202702993 is a prime.

It is a super-2 number, since 2×228471138449² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228471138449.

It is not a weakly prime, because it can be changed into another prime (228471138499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114235569224 + 114235569225.

It is an arithmetic number, because the mean of its divisors is an integer number (114235569225).

Almost surely, 2^228471138449 is an apocalyptic number.

It is an amenable number.

228471138449 is a deficient number, since it is larger than the sum of its proper divisors (1).

228471138449 is an equidigital number, since it uses as much as digits as its factorization.

228471138449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3096576, while the sum is 53.

The spelling of 228471138449 in words is "two hundred twenty-eight billion, four hundred seventy-one million, one hundred thirty-eight thousand, four hundred forty-nine".