225811541 has 2 divisors, whose sum is σ = 225811542. Its totient is φ = 225811540.

The previous prime is 225811517. The next prime is 225811571. The reversal of 225811541 is 145118522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145709041 + 80102500 = 12071^2 + 8950^2 .

It is a cyclic number.

It is not a de Polignac number, because 225811541 - 2²² = 221617237 is a prime.

It is equal to p_12424907 and since 225811541 and 12424907 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225811501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112905770 + 112905771.

It is an arithmetic number, because the mean of its divisors is an integer number (112905771).

Almost surely, 2^225811541 is an apocalyptic number.

It is an amenable number.

225811541 is a deficient number, since it is larger than the sum of its proper divisors (1).

225811541 is an equidigital number, since it uses as much as digits as its factorization.

225811541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 29.

The square root of 225811541 is about 15027.0270180099. The cubic root of 225811541 is about 608.9505749257.

The spelling of 225811541 in words is "two hundred twenty-five million, eight hundred eleven thousand, five hundred forty-one".