225021545 has 8 divisors (see below), whose sum is σ = 308601024. Its totient is φ = 154300464.

The previous prime is 225021539. The next prime is 225021557. The reversal of 225021545 is 545120522.

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

It is a cyclic number.

It is not a de Polignac number, because 225021545 - 2¹² = 225017449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3214559 + ... + 3214628.

It is an arithmetic number, because the mean of its divisors is an integer number (38575128).

Almost surely, 2^225021545 is an apocalyptic number.

It is an amenable number.

225021545 is a deficient number, since it is larger than the sum of its proper divisors (83579479).

225021545 is an equidigital number, since it uses as much as digits as its factorization.

225021545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6429199.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 225021545 is about 15000.7181494754. The cubic root of 225021545 is about 608.2396124254.

The spelling of 225021545 in words is "two hundred twenty-five million, twenty-one thousand, five hundred forty-five".