1131624225 has 36 divisors (see below), whose sum is σ = 2096768700. Its totient is φ = 582718080.

The previous prime is 1131624223. The next prime is 1131624233. The reversal of 1131624225 is 5224261311.

1131624225 is a `hidden beast` number, since 1 + 1 + 31 + 624 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 8503056 + 1123121169 = 2916^2 + 33513^2 .

It is not a de Polignac number, because 1131624225 - 2¹ = 1131624223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131624223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80190 + ... + 93239.

It is an arithmetic number, because the mean of its divisors is an integer number (58243575).

Almost surely, 2^1131624225 is an apocalyptic number.

1131624225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131624225 is a deficient number, since it is larger than the sum of its proper divisors (965144475).

1131624225 is a wasteful number, since it uses less digits than its factorization.

1131624225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173474 (or 173466 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1131624225 is about 33639.6228427133. The cubic root of 1131624225 is about 1042.0792429325.

Adding to 1131624225 its reverse (5224261311), we get a palindrome (6355885536).

The spelling of 1131624225 in words is "one billion, one hundred thirty-one million, six hundred twenty-four thousand, two hundred twenty-five".