25920311 has 4 divisors (see below), whose sum is σ = 25943232. Its totient is φ = 25897392.

The previous prime is 25920289. The next prime is 25920341. The reversal of 25920311 is 11302952.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25920311 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 (25920341) 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 3 ways as a sum of consecutive naturals, for example, 9671 + ... + 12056.

It is an arithmetic number, because the mean of its divisors is an integer number (6485808).

Almost surely, 2^25920311 is an apocalyptic number.

25920311 is a deficient number, since it is larger than the sum of its proper divisors (22921).

25920311 is a wasteful number, since it uses less digits than its factorization.

25920311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22920.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 25920311 is about 5091.1993675361. The cubic root of 25920311 is about 295.9466325445.

The spelling of 25920311 in words is "twenty-five million, nine hundred twenty thousand, three hundred eleven".