225757549 has 2 divisors, whose sum is σ = 225757550. Its totient is φ = 225757548.

The previous prime is 225757507. The next prime is 225757559. The reversal of 225757549 is 945757522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 109872324 = 10765^2 + 10482^2 .

It is a cyclic number.

It is not a de Polignac number, because 225757549 - 2¹³ = 225749357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225757499 and 225757508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225757559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112878774 + 112878775.

It is an arithmetic number, because the mean of its divisors is an integer number (112878775).

Almost surely, 2^225757549 is an apocalyptic number.

It is an amenable number.

225757549 is a deficient number, since it is larger than the sum of its proper divisors (1).

225757549 is an equidigital number, since it uses as much as digits as its factorization.

225757549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882000, while the sum is 46.

The square root of 225757549 is about 15025.2304142066. The cubic root of 225757549 is about 608.9020372822.

The spelling of 225757549 in words is "two hundred twenty-five million, seven hundred fifty-seven thousand, five hundred forty-nine".