225138829 has 2 divisors, whose sum is σ = 225138830. Its totient is φ = 225138828.

The previous prime is 225138787. The next prime is 225138857. The reversal of 225138829 is 928831522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176278729 + 48860100 = 13277^2 + 6990^2 .

It is a cyclic number.

It is not a de Polignac number, because 225138829 - 2¹³ = 225130637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225138791 and 225138800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225138929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112569414 + 112569415.

It is an arithmetic number, because the mean of its divisors is an integer number (112569415).

Almost surely, 2^225138829 is an apocalyptic number.

It is an amenable number.

225138829 is a deficient number, since it is larger than the sum of its proper divisors (1).

225138829 is an equidigital number, since it uses as much as digits as its factorization.

225138829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 225138829 is about 15004.6269197205. The cubic root of 225138829 is about 608.3452680630.

The spelling of 225138829 in words is "two hundred twenty-five million, one hundred thirty-eight thousand, eight hundred twenty-nine".