13991228035225 has 27 divisors (see below), whose sum is σ = 20181821445471. Its totient is φ = 9593895166800.

The previous prime is 13991228035129. The next prime is 13991228035247. The reversal of 13991228035225 is 52253082219931.

The square root of 13991228035225 is 3740485.

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., 5036842092681 + 8954385942544 = 2244291^2 + 2992388^2 .

It is not a de Polignac number, because 13991228035225 - 2⁹ = 13991228034713 is a prime.

It is a super-3 number, since 3×13991228035225³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 130863540 + ... + 130970410.

Almost surely, 2^{13991228035225} is an apocalyptic number.

13991228035225 is the 3740485-th square number.

13991228035225 is the 1870243-rd centered octagonal number.

It is an amenable number.

13991228035225 is a deficient number, since it is larger than the sum of its proper divisors (6190593410246).

13991228035225 is an frugal number, since it uses more digits than its factorization.

13991228035225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213766 (or 106883 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 13991228035225 in words is "thirteen trillion, nine hundred ninety-one billion, two hundred twenty-eight million, thirty-five thousand, two hundred twenty-five".