1213533576025 has 27 divisors (see below), whose sum is σ = 1534078475671. Its totient is φ = 952280239040.

The previous prime is 1213533575999. The next prime is 1213533576029. The reversal of 1213533576025 is 5206753353121.

The square root of 1213533576025 is 1101605.

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

It can be written as a sum of positive squares in 13 ways, for example, as 555676320969 + 657857255056 = 745437^2 + 811084^2 .

It is not a de Polignac number, because 1213533576025 - 2²³ = 1213525187417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213533576029) 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, 291923247 + ... + 291927403.

Almost surely, 2^{1213533576025} is an apocalyptic number.

1213533576025 is the 1101605-th square number.

1213533576025 is the 550803-rd centered octagonal number.

It is an amenable number.

1213533576025 is a deficient number, since it is larger than the sum of its proper divisors (320544899646).

1213533576025 is an frugal number, since it uses more digits than its factorization.

1213533576025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8430 (or 4215 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 43.

The spelling of 1213533576025 in words is "one trillion, two hundred thirteen billion, five hundred thirty-three million, five hundred seventy-six thousand, twenty-five".