225145279 has 2 divisors, whose sum is σ = 225145280. Its totient is φ = 225145278.

The previous prime is 225145273. The next prime is 225145289. The reversal of 225145279 is 972541522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225145279 - 2⁵ = 225145247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225145273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112572639 + 112572640.

It is an arithmetic number, because the mean of its divisors is an integer number (112572640).

Almost surely, 2^225145279 is an apocalyptic number.

225145279 is a deficient number, since it is larger than the sum of its proper divisors (1).

225145279 is an equidigital number, since it uses as much as digits as its factorization.

225145279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 225145279 is about 15004.8418518823. The cubic root of 225145279 is about 608.3510775000.

The spelling of 225145279 in words is "two hundred twenty-five million, one hundred forty-five thousand, two hundred seventy-nine".