225435454421 has 2 divisors, whose sum is σ = 225435454422. Its totient is φ = 225435454420.

The previous prime is 225435454393. The next prime is 225435454429. The reversal of 225435454421 is 124454534522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210693852196 + 14741602225 = 459014^2 + 121415^2 .

It is a cyclic number.

It is not a de Polignac number, because 225435454421 - 2²⁶ = 225368345557 is a prime.

It is a super-2 number, since 2×225435454421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225435454429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112717727210 + 112717727211.

It is an arithmetic number, because the mean of its divisors is an integer number (112717727211).

Almost surely, 2^225435454421 is an apocalyptic number.

It is an amenable number.

225435454421 is a deficient number, since it is larger than the sum of its proper divisors (1).

225435454421 is an equidigital number, since it uses as much as digits as its factorization.

225435454421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768000, while the sum is 41.

Adding to 225435454421 its reverse (124454534522), we get a palindrome (349889988943).

The spelling of 225435454421 in words is "two hundred twenty-five billion, four hundred thirty-five million, four hundred fifty-four thousand, four hundred twenty-one".