25956431 has 4 divisors (see below), whose sum is σ = 26146032. Its totient is φ = 25766832.

The previous prime is 25956419. The next prime is 25956449. The reversal of 25956431 is 13465952.

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 25956431 - 2¹⁸ = 25694287 is a prime.

It is a super-2 number, since 2×25956431² = 1347472620515522, 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 = 25956391 and 25956400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25956461) 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, 94595 + ... + 94868.

It is an arithmetic number, because the mean of its divisors is an integer number (6536508).

Almost surely, 2^25956431 is an apocalyptic number.

25956431 is a deficient number, since it is larger than the sum of its proper divisors (189601).

25956431 is a wasteful number, since it uses less digits than its factorization.

25956431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189600.

The product of its digits is 32400, while the sum is 35.

The square root of 25956431 is about 5094.7454303429. The cubic root of 25956431 is about 296.0840361284.

The spelling of 25956431 in words is "twenty-five million, nine hundred fifty-six thousand, four hundred thirty-one".