225547939 has 2 divisors, whose sum is σ = 225547940. Its totient is φ = 225547938.

The previous prime is 225547921. The next prime is 225547951. The reversal of 225547939 is 939745522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225547939 - 2⁷ = 225547811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225547919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112773969 + 112773970.

It is an arithmetic number, because the mean of its divisors is an integer number (112773970).

Almost surely, 2^225547939 is an apocalyptic number.

225547939 is a deficient number, since it is larger than the sum of its proper divisors (1).

225547939 is an equidigital number, since it uses as much as digits as its factorization.

225547939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 225547939 is about 15018.2535269585. The cubic root of 225547939 is about 608.7135290382.

The spelling of 225547939 in words is "two hundred twenty-five million, five hundred forty-seven thousand, nine hundred thirty-nine".