225138481 has 2 divisors, whose sum is σ = 225138482. Its totient is φ = 225138480.

The previous prime is 225138469. The next prime is 225138493. The reversal of 225138481 is 184831522.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (225138469) and next prime (225138493).

It can be written as a sum of positive squares in only one way, i.e., 223203600 + 1934881 = 14940^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 225138481 - 2⁵ = 225138449 is a prime.

It is a super-2 number, since 2×225138481² = 101374671253974722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225138181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112569240 + 112569241.

It is an arithmetic number, because the mean of its divisors is an integer number (112569241).

Almost surely, 2^225138481 is an apocalyptic number.

It is an amenable number.

225138481 is a deficient number, since it is larger than the sum of its proper divisors (1).

225138481 is an equidigital number, since it uses as much as digits as its factorization.

225138481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 34.

The square root of 225138481 is about 15004.6153232930. The cubic root of 225138481 is about 608.3449546205.

The spelling of 225138481 in words is "two hundred twenty-five million, one hundred thirty-eight thousand, four hundred eighty-one".