25131982 has 4 divisors (see below), whose sum is σ = 37697976. Its totient is φ = 12565990.

The previous prime is 25131973. The next prime is 25131983. The reversal of 25131982 is 28913152.

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 (25131983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282994 + ... + 6282997.

It is an arithmetic number, because the mean of its divisors is an integer number (9424494).

Almost surely, 2^25131982 is an apocalyptic number.

25131982 is a deficient number, since it is larger than the sum of its proper divisors (12565994).

25131982 is a wasteful number, since it uses less digits than its factorization.

25131982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12565993.

The product of its digits is 4320, while the sum is 31.

The square root of 25131982 is about 5013.1808265811. The cubic root of 25131982 is about 292.9154279165.

The spelling of 25131982 in words is "twenty-five million, one hundred thirty-one thousand, nine hundred eighty-two".