225145873 has 4 divisors (see below), whose sum is σ = 234934848. Its totient is φ = 215356900.

The previous prime is 225145859. The next prime is 225145889. The reversal of 225145873 is 378541522.

225145873 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225145873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225145273) 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, 4894453 + ... + 4894498.

It is an arithmetic number, because the mean of its divisors is an integer number (58733712).

Almost surely, 2^225145873 is an apocalyptic number.

225145873 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

225145873 is a deficient number, since it is larger than the sum of its proper divisors (9788975).

225145873 is an equidigital number, since it uses as much as digits as its factorization.

225145873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788974.

The product of its digits is 67200, while the sum is 37.

The square root of 225145873 is about 15004.8616454801. The cubic root of 225145873 is about 608.3516125030.

The spelling of 225145873 in words is "two hundred twenty-five million, one hundred forty-five thousand, eight hundred seventy-three".