225251545 has 4 divisors (see below), whose sum is σ = 270301860. Its totient is φ = 180201232.

The previous prime is 225251539. The next prime is 225251563. The reversal of 225251545 is 545152522.

It is a happy number.

225251545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 101062809 + 124188736 = 10053^2 + 11144^2 .

It is a cyclic number.

It is not a de Polignac number, because 225251545 - 2¹⁷ = 225120473 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 22525150 + ... + 22525159.

It is an arithmetic number, because the mean of its divisors is an integer number (67575465).

Almost surely, 2^225251545 is an apocalyptic number.

It is an amenable number.

225251545 is a deficient number, since it is larger than the sum of its proper divisors (45050315).

225251545 is an equidigital number, since it uses as much as digits as its factorization.

225251545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45050314.

The product of its digits is 20000, while the sum is 31.

The square root of 225251545 is about 15008.3824911281. The cubic root of 225251545 is about 608.4467740323.

The spelling of 225251545 in words is "two hundred twenty-five million, two hundred fifty-one thousand, five hundred forty-five".