225514721 has 2 divisors, whose sum is σ = 225514722. Its totient is φ = 225514720.

The previous prime is 225514711. The next prime is 225514727. The reversal of 225514721 is 127415522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211557025 + 13957696 = 14545^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 225514721 - 2¹⁴ = 225498337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225514727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112757360 + 112757361.

It is an arithmetic number, because the mean of its divisors is an integer number (112757361).

Almost surely, 2^225514721 is an apocalyptic number.

It is an amenable number.

225514721 is a deficient number, since it is larger than the sum of its proper divisors (1).

225514721 is an equidigital number, since it uses as much as digits as its factorization.

225514721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5600, while the sum is 29.

The square root of 225514721 is about 15017.1475653667. The cubic root of 225514721 is about 608.6836444250.

It can be divided in two parts, 22551 and 4721, that added together give a palindrome (27272).

The spelling of 225514721 in words is "two hundred twenty-five million, five hundred fourteen thousand, seven hundred twenty-one".