2261016225 has 72 divisors (see below), whose sum is σ = 4421409720. Its totient is φ = 1097763840.

The previous prime is 2261016223. The next prime is 2261016227. The reversal of 2261016225 is 5226101622.

2261016225 is a `hidden beast` number, since 2 + 26 + 10 + 1 + 622 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2261016223) and next prime (2261016227).

It can be written as a sum of positive squares in 12 ways, for example, as 1391886864 + 869129361 = 37308^2 + 29481^2 .

It is not a de Polignac number, because 2261016225 - 2¹ = 2261016223 is a prime.

It is a super-2 number, since 2×2261016225² = 10224388739426501250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261016221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 208231 + ... + 218819.

Almost surely, 2^2261016225 is an apocalyptic number.

2261016225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2261016225 is a deficient number, since it is larger than the sum of its proper divisors (2160393495).

2261016225 is a wasteful number, since it uses less digits than its factorization.

2261016225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10691 (or 10683 counting only the distinct ones).

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

The square root of 2261016225 is about 47550.1443215475. The cubic root of 2261016225 is about 1312.5057850085.

Adding to 2261016225 its reverse (5226101622), we get a palindrome (7487117847).

The spelling of 2261016225 in words is "two billion, two hundred sixty-one million, sixteen thousand, two hundred twenty-five".