225215745 has 32 divisors (see below), whose sum is σ = 384134400. Its totient is φ = 112281600.

The previous prime is 225215689. The next prime is 225215761. The reversal of 225215745 is 547512522.

It is not a de Polignac number, because 225215745 - 2¹³ = 225207553 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35581 + ... + 41429.

It is an arithmetic number, because the mean of its divisors is an integer number (12004200).

Almost surely, 2^225215745 is an apocalyptic number.

It is an amenable number.

225215745 is a deficient number, since it is larger than the sum of its proper divisors (158918655).

225215745 is a wasteful number, since it uses less digits than its factorization.

225215745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025.

The product of its digits is 28000, while the sum is 33.

The square root of 225215745 is about 15007.1897769036. The cubic root of 225215745 is about 608.4145381474.

The spelling of 225215745 in words is "two hundred twenty-five million, two hundred fifteen thousand, seven hundred forty-five".