225092364721 has 9 divisors (see below), whose sum is σ = 261846001899. Its totient is φ = 192933465984.

The previous prime is 225092364709. The next prime is 225092364781. The reversal of 225092364721 is 127463290522.

The square root of 225092364721 is 474439.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 154901280625 + 70191084096 = 393575^2 + 264936^2 .

It is not a de Polignac number, because 225092364721 - 2⁹ = 225092364209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225092364781) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3287185 + ... + 3354961.

It is an arithmetic number, because the mean of its divisors is an integer number (29094000211).

Almost surely, 2^225092364721 is an apocalyptic number.

225092364721 is the 474439-th square number.

225092364721 is the 237220-th centered octagonal number.

It is an amenable number.

225092364721 is a deficient number, since it is larger than the sum of its proper divisors (36753637178).

225092364721 is an frugal number, since it uses more digits than its factorization.

225092364721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135568 (or 67784 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 225092364721 in words is "two hundred twenty-five billion, ninety-two million, three hundred sixty-four thousand, seven hundred twenty-one".