11143969225 has 27 divisors (see below), whose sum is σ = 14176228359. Its totient is φ = 8690110800.

The previous prime is 11143969201. The next prime is 11143969241. The reversal of 11143969225 is 52296934111.

The square root of 11143969225 is 105565.

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., 4011828921 + 7132140304 = 63339^2 + 84452^2 .

It is not a de Polignac number, because 11143969225 - 2⁷ = 11143969097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

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, 22696230 + ... + 22696720.

Almost surely, 2^11143969225 is an apocalyptic number.

11143969225 is the 105565-th square number.

11143969225 is the 52783-rd centered octagonal number.

It is an amenable number.

11143969225 is a deficient number, since it is larger than the sum of its proper divisors (3032259134).

11143969225 is an frugal number, since it uses more digits than its factorization.

11143969225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 539 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The spelling of 11143969225 in words is "eleven billion, one hundred forty-three million, nine hundred sixty-nine thousand, two hundred twenty-five".