13521982 has 4 divisors (see below), whose sum is σ = 20282976. Its totient is φ = 6760990.

The previous prime is 13521979. The next prime is 13522013. The reversal of 13521982 is 28912531.

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

It is a congruent number.

It is an unprimeable number.

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, 3380494 + ... + 3380497.

It is an arithmetic number, because the mean of its divisors is an integer number (5070744).

Almost surely, 2^13521982 is an apocalyptic number.

13521982 is a deficient number, since it is larger than the sum of its proper divisors (6760994).

13521982 is an equidigital number, since it uses as much as digits as its factorization.

13521982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760993.

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

The square root of 13521982 is about 3677.2247687624. The cubic root of 13521982 is about 238.2393256754.

The spelling of 13521982 in words is "thirteen million, five hundred twenty-one thousand, nine hundred eighty-two".