25523139 has 8 divisors (see below), whose sum is σ = 34209792. Its totient is φ = 16925960.

The previous prime is 25523131. The next prime is 25523149. The reversal of 25523139 is 93132552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25523139 - 2³ = 25523131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25523131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21699 + ... + 22844.

It is an arithmetic number, because the mean of its divisors is an integer number (4276224).

Almost surely, 2^25523139 is an apocalyptic number.

25523139 is a deficient number, since it is larger than the sum of its proper divisors (8686653).

25523139 is a wasteful number, since it uses less digits than its factorization.

25523139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44737.

The product of its digits is 8100, while the sum is 30.

The square root of 25523139 is about 5052.0430520731. The cubic root of 25523139 is about 294.4272675976.

The spelling of 25523139 in words is "twenty-five million, five hundred twenty-three thousand, one hundred thirty-nine".