25854431 has 2 divisors, whose sum is σ = 25854432. Its totient is φ = 25854430.

The previous prime is 25854401. The next prime is 25854443. The reversal of 25854431 is 13445852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25854431 - 2²² = 21660127 is a prime.

It is a super-2 number, since 2×25854431² = 1336903204667522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25854401) 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 as a sum of consecutive naturals, namely, 12927215 + 12927216.

It is an arithmetic number, because the mean of its divisors is an integer number (12927216).

Almost surely, 2^25854431 is an apocalyptic number.

25854431 is a deficient number, since it is larger than the sum of its proper divisors (1).

25854431 is an equidigital number, since it uses as much as digits as its factorization.

25854431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 32.

The square root of 25854431 is about 5084.7252629813. The cubic root of 25854431 is about 295.6956902676.

The spelling of 25854431 in words is "twenty-five million, eight hundred fifty-four thousand, four hundred thirty-one".