25321099 has 2 divisors, whose sum is σ = 25321100. Its totient is φ = 25321098.

The previous prime is 25321013. The next prime is 25321151. The reversal of 25321099 is 99012352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25321099 - 2¹³ = 25312907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25321099.

It is not a weakly prime, because it can be changed into another prime (25321799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660549 + 12660550.

It is an arithmetic number, because the mean of its divisors is an integer number (12660550).

Almost surely, 2^25321099 is an apocalyptic number.

25321099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321099 is an equidigital number, since it uses as much as digits as its factorization.

25321099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25321099 is about 5032.0074522997. The cubic root of 25321099 is about 293.6483176660.

The spelling of 25321099 in words is "twenty-five million, three hundred twenty-one thousand, ninety-nine".