227129449561 has 27 divisors (see below), whose sum is σ = 267206120703. Its totient is φ = 192500597520.

The previous prime is 227129449499. The next prime is 227129449669. The reversal of 227129449561 is 165944921722.

The square root of 227129449561 is 476581.

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

It can be written as a sum of positive squares in only one way, i.e., 180343759561 + 46785690000 = 424669^2 + 216300^2 .

It is not a de Polignac number, because 227129449561 - 2⁹ = 227129449049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 227129449499 and 227129449508.

It is not an unprimeable number, because it can be changed into a prime (227129449861) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 343614571 + ... + 343615231.

It is an arithmetic number, because the mean of its divisors is an integer number (9896522989).

Almost surely, 2^227129449561 is an apocalyptic number.

227129449561 is the 476581-st square number.

227129449561 is the 238291-st centered octagonal number.

It is an amenable number.

227129449561 is a deficient number, since it is larger than the sum of its proper divisors (40076671142).

227129449561 is an frugal number, since it uses more digits than its factorization.

227129449561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 771 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 227129449561 in words is "two hundred twenty-seven billion, one hundred twenty-nine million, four hundred forty-nine thousand, five hundred sixty-one".