25190881 has 4 divisors (see below), whose sum is σ = 25422100. Its totient is φ = 24959664.

The previous prime is 25190873. The next prime is 25190887. The reversal of 25190881 is 18809152.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 6838225 = 4284^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 25190881 - 2³ = 25190873 is a prime.

It is a super-2 number, since 2×25190881² = 1269160971112322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25190887) 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, 115446 + ... + 115663.

It is an arithmetic number, because the mean of its divisors is an integer number (6355525).

Almost surely, 2^25190881 is an apocalyptic number.

It is an amenable number.

25190881 is a deficient number, since it is larger than the sum of its proper divisors (231219).

25190881 is a wasteful number, since it uses less digits than its factorization.

25190881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231218.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 25190881 is about 5019.0518028807. The cubic root of 25190881 is about 293.1440737085.

The spelling of 25190881 in words is "twenty-five million, one hundred ninety thousand, eight hundred eighty-one".