25152109 has 2 divisors, whose sum is σ = 25152110. Its totient is φ = 25152108.

The previous prime is 25152107. The next prime is 25152137. The reversal of 25152109 is 90125152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23794884 + 1357225 = 4878^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 25152109 - 2¹ = 25152107 is a prime.

Together with 25152107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25152107) 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, 12576054 + 12576055.

It is an arithmetic number, because the mean of its divisors is an integer number (12576055).

Almost surely, 2^25152109 is an apocalyptic number.

It is an amenable number.

25152109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25152109 is an equidigital number, since it uses as much as digits as its factorization.

25152109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 25152109 is about 5015.1878329730. The cubic root of 25152109 is about 292.9936010282.

It can be divided in two parts, 2515 and 2109, that added together give a square (4624 = 68²).

The spelling of 25152109 in words is "twenty-five million, one hundred fifty-two thousand, one hundred nine".