225243541 has 2 divisors, whose sum is σ = 225243542. Its totient is φ = 225243540.

The previous prime is 225243539. The next prime is 225243563. The reversal of 225243541 is 145342522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127035441 + 98208100 = 11271^2 + 9910^2 .

It is a cyclic number.

It is not a de Polignac number, because 225243541 - 2¹ = 225243539 is a prime.

Together with 225243539, 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 (225243511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112621770 + 112621771.

It is an arithmetic number, because the mean of its divisors is an integer number (112621771).

Almost surely, 2^225243541 is an apocalyptic number.

It is an amenable number.

225243541 is a deficient number, since it is larger than the sum of its proper divisors (1).

225243541 is an equidigital number, since it uses as much as digits as its factorization.

225243541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 28.

The square root of 225243541 is about 15008.1158377726. The cubic root of 225243541 is about 608.4395671773.

The spelling of 225243541 in words is "two hundred twenty-five million, two hundred forty-three thousand, five hundred forty-one".