25651982 has 4 divisors (see below), whose sum is σ = 38477976. Its totient is φ = 12825990.

The previous prime is 25651943. The next prime is 25651987. The reversal of 25651982 is 28915652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25651987) 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, 6412994 + ... + 6412997.

It is an arithmetic number, because the mean of its divisors is an integer number (9619494).

Almost surely, 2^25651982 is an apocalyptic number.

25651982 is a deficient number, since it is larger than the sum of its proper divisors (12825994).

25651982 is a wasteful number, since it uses less digits than its factorization.

25651982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12825993.

The product of its digits is 43200, while the sum is 38.

The square root of 25651982 is about 5064.7785736397. The cubic root of 25651982 is about 294.9218676543.

The spelling of 25651982 in words is "twenty-five million, six hundred fifty-one thousand, nine hundred eighty-two".