225993750545 has 4 divisors (see below), whose sum is σ = 271192500660. Its totient is φ = 180795000432.

The previous prime is 225993750539. The next prime is 225993750559. The reversal of 225993750545 is 545057399522.

It is a Cunningham number, because it is equal to 475388²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81357293824 + 144636456721 = 285232^2 + 380311^2 .

It is a cyclic number.

It is not a de Polignac number, because 225993750545 - 2⁴ = 225993750529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22599375050 + ... + 22599375059.

It is an arithmetic number, because the mean of its divisors is an integer number (67798125165).

Almost surely, 2^225993750545 is an apocalyptic number.

It is an amenable number.

225993750545 is a deficient number, since it is larger than the sum of its proper divisors (45198750115).

225993750545 is an equidigital number, since it uses as much as digits as its factorization.

225993750545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45198750114.

The product of its (nonzero) digits is 17010000, while the sum is 56.

The spelling of 225993750545 in words is "two hundred twenty-five billion, nine hundred ninety-three million, seven hundred fifty thousand, five hundred forty-five".