11154528225 has 45 divisors (see below), whose sum is σ = 20670849507. Its totient is φ = 5946546960.

The previous prime is 11154528199. The next prime is 11154528233. The reversal of 11154528225 is 52282545111.

The square root of 11154528225 is 105615.

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

11154528225 is a `hidden beast` number, since 1 + 11 + 545 + 2 + 82 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4015630161 + 7138898064 = 63369^2 + 84492^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 11154528225 - 2²⁹ = 10617657313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11154528225.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 4751502 + ... + 4753848.

Almost surely, 2^11154528225 is an apocalyptic number.

11154528225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11154528225 is the 105615-th square number.

11154528225 is the 52808-th centered octagonal number.

It is an amenable number.

11154528225 is a deficient number, since it is larger than the sum of its proper divisors (9516321282).

11154528225 is an frugal number, since it uses more digits than its factorization.

11154528225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716 (or 2355 counting only the distinct ones).

The product of its digits is 32000, while the sum is 36.

Multiplying 11154528225 by its sum of digits (36), we get a square (401563016100 = 633690²).

The spelling of 11154528225 in words is "eleven billion, one hundred fifty-four million, five hundred twenty-eight thousand, two hundred twenty-five".