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25914221 is a prime number
BaseRepresentation
bin110001011011…
…0101101101101
31210202120121222
41202312231231
523113223341
62323233125
7433160444
oct142665555
953676558
1025914221
111369a813
1288187a5
1354a4378
143627d5b
15241d44b
hex18b6b6d

25914221 has 2 divisors, whose sum is σ = 25914222. Its totient is φ = 25914220.

The previous prime is 25914211. The next prime is 25914227. The reversal of 25914221 is 12241952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 6817321 = 4370^2 + 2611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-25914221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25914227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12957110 + 12957111.

It is an arithmetic number, because the mean of its divisors is an integer number (12957111).

Almost surely, 225914221 is an apocalyptic number.

It is an amenable number.

25914221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25914221 is an equidigital number, since it uses as much as digits as its factorization.

25914221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 25914221 is about 5090.6012415038. The cubic root of 25914221 is about 295.9234530880.

The spelling of 25914221 in words is "twenty-five million, nine hundred fourteen thousand, two hundred twenty-one".