25321603 has 2 divisors, whose sum is σ = 25321604. Its totient is φ = 25321602.

The previous prime is 25321601. The next prime is 25321613. The reversal of 25321603 is 30612352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25321603 - 2¹ = 25321601 is a prime.

Together with 25321601, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25321601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660801 + 12660802.

It is an arithmetic number, because the mean of its divisors is an integer number (12660802).

Almost surely, 2^25321603 is an apocalyptic number.

25321603 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321603 is an equidigital number, since it uses as much as digits as its factorization.

25321603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 25321603 is about 5032.0575314676. The cubic root of 25321603 is about 293.6502659459.

Adding to 25321603 its reverse (30612352), we get a palindrome (55933955).

The spelling of 25321603 in words is "twenty-five million, three hundred twenty-one thousand, six hundred three".