1228530608881 has 9 divisors (see below), whose sum is σ = 1238126627019. Its totient is φ = 1219008421800.

The previous prime is 1228530608861. The next prime is 1228530608891. The reversal of 1228530608881 is 1888060358221.

The square root of 1228530608881 is 1108391.

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., 1027808688481 + 200721920400 = 1013809^2 + 448020^2 .

It is not a de Polignac number, because 1228530608881 - 2¹¹ = 1228530606833 is a prime.

It is a super-2 number, since 2×1228530608881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228530608801) 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, 145194991 + ... + 145203451.

Almost surely, 2^{1228530608881} is an apocalyptic number.

1228530608881 is the 1108391-st square number.

1228530608881 is the 554196-th centered octagonal number.

It is an amenable number.

1228530608881 is a deficient number, since it is larger than the sum of its proper divisors (9596018138).

1228530608881 is an frugal number, since it uses more digits than its factorization.

1228530608881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17184 (or 8592 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 1228530608881 in words is "one trillion, two hundred twenty-eight billion, five hundred thirty million, six hundred eight thousand, eight hundred eighty-one".