25195019 has 4 divisors (see below), whose sum is σ = 25334400. Its totient is φ = 25055640.

The previous prime is 25194977. The next prime is 25195057. The reversal of 25195019 is 91059152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25195019 - 2¹⁶ = 25129483 is a prime.

It is a super-2 number, since 2×25195019² = 1269577964820722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25195069) 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, 69419 + ... + 69780.

It is an arithmetic number, because the mean of its divisors is an integer number (6333600).

Almost surely, 2^25195019 is an apocalyptic number.

25195019 is a deficient number, since it is larger than the sum of its proper divisors (139381).

25195019 is a wasteful number, since it uses less digits than its factorization.

25195019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139380.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 25195019 is about 5019.4640152112. The cubic root of 25195019 is about 293.1601240108.

The spelling of 25195019 in words is "twenty-five million, one hundred ninety-five thousand, nineteen".