225720736305 has 16 divisors (see below), whose sum is σ = 361461620544. Its totient is φ = 120281578560.

The previous prime is 225720736291. The next prime is 225720736309. The reversal of 225720736305 is 503637027522.

It is not a de Polignac number, because 225720736305 - 2¹⁷ = 225720605233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225720736309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6407734 + ... + 6442863.

It is an arithmetic number, because the mean of its divisors is an integer number (22591351284).

Almost surely, 2^225720736305 is an apocalyptic number.

It is an amenable number.

225720736305 is a deficient number, since it is larger than the sum of its proper divisors (135740884239).

225720736305 is a wasteful number, since it uses less digits than its factorization.

225720736305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12851776.

The product of its (nonzero) digits is 529200, while the sum is 42.

The spelling of 225720736305 in words is "two hundred twenty-five billion, seven hundred twenty million, seven hundred thirty-six thousand, three hundred five".