25017229 has 2 divisors, whose sum is σ = 25017230. Its totient is φ = 25017228.

The previous prime is 25017221. The next prime is 25017241. The reversal of 25017229 is 92271052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23785129 + 1232100 = 4877^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 25017229 - 2³ = 25017221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25017197 and 25017206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25017221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12508614 + 12508615.

It is an arithmetic number, because the mean of its divisors is an integer number (12508615).

Almost surely, 2^25017229 is an apocalyptic number.

It is an amenable number.

25017229 is a deficient number, since it is larger than the sum of its proper divisors (1).

25017229 is an equidigital number, since it uses as much as digits as its factorization.

25017229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25017229 is about 5001.7226032638. The cubic root of 25017229 is about 292.4689289323.

Subtracting from 25017229 its sum of digits (28), we obtain a triangular number (25017201 = T₇₀₇₃).

It can be divided in two parts, 2501 and 7229, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 25017229 in words is "twenty-five million, seventeen thousand, two hundred twenty-nine".