25783481 has 4 divisors (see below), whose sum is σ = 25820964. Its totient is φ = 25746000.

The previous prime is 25783463. The next prime is 25783507. The reversal of 25783481 is 18438752.

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 9096256 + 16687225 = 3016^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 25783481 - 2¹⁰ = 25782457 is a prime.

It is a super-2 number, since 2×25783481² = 1329575784954722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25783411) 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, 17690 + ... + 19091.

It is an arithmetic number, because the mean of its divisors is an integer number (6455241).

Almost surely, 2^25783481 is an apocalyptic number.

It is an amenable number.

25783481 is a deficient number, since it is larger than the sum of its proper divisors (37483).

25783481 is an equidigital number, since it uses as much as digits as its factorization.

25783481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37482.

The product of its digits is 53760, while the sum is 38.

The square root of 25783481 is about 5077.7436918379. The cubic root of 25783481 is about 295.4249587328.

It can be divided in two parts, 257 and 83481, that added together give a palindrome (83738).

The spelling of 25783481 in words is "twenty-five million, seven hundred eighty-three thousand, four hundred eighty-one".