225928765309 has 4 divisors (see below), whose sum is σ = 243307901116. Its totient is φ = 208549629504.

The previous prime is 225928765277. The next prime is 225928765327. The reversal of 225928765309 is 903567829522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903567829522 = 2 ⋅451783914761.

It can be written as a sum of positive squares in 2 ways, for example, as 43666371225 + 182262394084 = 208965^2 + 426922^2 .

It is a cyclic number.

It is not a de Polignac number, because 225928765309 - 2⁵ = 225928765277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225928765379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8689567884 + ... + 8689567909.

It is an arithmetic number, because the mean of its divisors is an integer number (60826975279).

Almost surely, 2^225928765309 is an apocalyptic number.

It is an amenable number.

225928765309 is a deficient number, since it is larger than the sum of its proper divisors (17379135807).

225928765309 is a wasteful number, since it uses less digits than its factorization.

225928765309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17379135806.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 225928765309 in words is "two hundred twenty-five billion, nine hundred twenty-eight million, seven hundred sixty-five thousand, three hundred nine".