225720736306 has 8 divisors (see below), whose sum is σ = 364625804844. Its totient is φ = 104178801360.

The previous prime is 225720736291. The next prime is 225720736309. The reversal of 225720736306 is 603637027522.

It can be written as a sum of positive squares in 2 ways, for example, as 190540107081 + 35180629225 = 436509^2 + 187565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 4340783365 + ... + 4340783416.

Almost surely, 2^225720736306 is an apocalyptic number.

225720736306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

225720736306 is a deficient number, since it is larger than the sum of its proper divisors (138905068538).

225720736306 is a wasteful number, since it uses less digits than its factorization.

225720736306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681566796.

The product of its (nonzero) digits is 635040, while the sum is 43.

The spelling of 225720736306 in words is "two hundred twenty-five billion, seven hundred twenty million, seven hundred thirty-six thousand, three hundred six".