25573109 has 4 divisors (see below), whose sum is σ = 26398080. Its totient is φ = 24748140.

The previous prime is 25573103. The next prime is 25573127. The reversal of 25573109 is 90137552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25573109 - 2¹² = 25569013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25573103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412439 + ... + 412500.

It is an arithmetic number, because the mean of its divisors is an integer number (6599520).

Almost surely, 2^25573109 is an apocalyptic number.

It is an amenable number.

25573109 is a deficient number, since it is larger than the sum of its proper divisors (824971).

25573109 is an equidigital number, since it uses as much as digits as its factorization.

25573109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824970.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 25573109 is about 5056.9861577821. The cubic root of 25573109 is about 294.6192886422.

The spelling of 25573109 in words is "twenty-five million, five hundred seventy-three thousand, one hundred nine".