25525019 has 4 divisors (see below), whose sum is σ = 27488496. Its totient is φ = 23561544.

The previous prime is 25524991. The next prime is 25525039. The reversal of 25525019 is 91052552.

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 25525019 - 2²⁰ = 24476443 is a prime.

It is a super-2 number, since 2×25525019² = 1303053189900722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25524982 and 25525000.

It is not an unprimeable number, because it can be changed into a prime (25525039) 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, 981719 + ... + 981744.

It is an arithmetic number, because the mean of its divisors is an integer number (6872124).

Almost surely, 2^25525019 is an apocalyptic number.

25525019 is a deficient number, since it is larger than the sum of its proper divisors (1963477).

25525019 is a wasteful number, since it uses less digits than its factorization.

25525019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963476.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 25525019 is about 5052.2291119861. The cubic root of 25525019 is about 294.4344964586.

The spelling of 25525019 in words is "twenty-five million, five hundred twenty-five thousand, nineteen".