2113155225 has 18 divisors (see below), whose sum is σ = 3784896206. Its totient is φ = 1127016000.

The previous prime is 2113155223. The next prime is 2113155227. The reversal of 2113155225 is 5225513112.

2113155225 is a `hidden beast` number, since 2 + 1 + 131 + 5 + 522 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2113155223) and next prime (2113155227).

It can be written as a sum of positive squares in 3 ways, for example, as 156950784 + 1956204441 = 12528^2 + 44229^2 .

It is not a de Polignac number, because 2113155225 - 2¹ = 2113155223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113155223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4695676 + ... + 4696125.

Almost surely, 2^2113155225 is an apocalyptic number.

2113155225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2113155225 is a deficient number, since it is larger than the sum of its proper divisors (1671740981).

2113155225 is a wasteful number, since it uses less digits than its factorization.

2113155225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391817 (or 9391809 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 2113155225 is about 45969.0681328217. The cubic root of 2113155225 is about 1283.2476176329.

Adding to 2113155225 its reverse (5225513112), we get a palindrome (7338668337).

The spelling of 2113155225 in words is "two billion, one hundred thirteen million, one hundred fifty-five thousand, two hundred twenty-five".