25035221 has 4 divisors (see below), whose sum is σ = 25046892. Its totient is φ = 25023552.

The previous prime is 25035211. The next prime is 25035223. The reversal of 25035221 is 12253052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 4884100 = 4489^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 25035221 - 2¹⁰ = 25034197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25035193 and 25035202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25035223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (6261723).

Almost surely, 2^25035221 is an apocalyptic number.

It is an amenable number.

25035221 is a deficient number, since it is larger than the sum of its proper divisors (11671).

25035221 is an equidigital number, since it uses as much as digits as its factorization.

25035221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11670.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 25035221 is about 5003.5208603542. The cubic root of 25035221 is about 292.5390251581.

Adding to 25035221 its reverse (12253052), we get a palindrome (37288273).

The spelling of 25035221 in words is "twenty-five million, thirty-five thousand, two hundred twenty-one".