225540613 has 2 divisors, whose sum is σ = 225540614. Its totient is φ = 225540612.

The previous prime is 225540611. The next prime is 225540671. The reversal of 225540613 is 316045522.

225540613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225540324 + 289 = 15018^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 225540613 - 2¹ = 225540611 is a prime.

It is a super-2 number, since 2×225540613² = 101737136224831538, which contains 22 as substring.

Together with 225540611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225540611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112770306 + 112770307.

It is an arithmetic number, because the mean of its divisors is an integer number (112770307).

Almost surely, 2^225540613 is an apocalyptic number.

It is an amenable number.

225540613 is a deficient number, since it is larger than the sum of its proper divisors (1).

225540613 is an equidigital number, since it uses as much as digits as its factorization.

225540613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 225540613 is about 15018.0096217841. The cubic root of 225540613 is about 608.7069384458.

The spelling of 225540613 in words is "two hundred twenty-five million, five hundred forty thousand, six hundred thirteen".