225548757481 has 2 divisors, whose sum is σ = 225548757482. Its totient is φ = 225548757480.

The previous prime is 225548757443. The next prime is 225548757517. The reversal of 225548757481 is 184757845522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149196015081 + 76352742400 = 386259^2 + 276320^2 .

It is a cyclic number.

It is not a de Polignac number, because 225548757481 - 2²⁵ = 225515203049 is a prime.

It is a super-2 number, since 2×225548757481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225548751481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112774378740 + 112774378741.

It is an arithmetic number, because the mean of its divisors is an integer number (112774378741).

Almost surely, 2^225548757481 is an apocalyptic number.

It is an amenable number.

225548757481 is a deficient number, since it is larger than the sum of its proper divisors (1).

225548757481 is an equidigital number, since it uses as much as digits as its factorization.

225548757481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088000, while the sum is 58.

The spelling of 225548757481 in words is "two hundred twenty-five billion, five hundred forty-eight million, seven hundred fifty-seven thousand, four hundred eighty-one".