21231014 has 16 divisors (see below), whose sum is σ = 37140000. Its totient is φ = 9098712.

The previous prime is 21230969. The next prime is 21231029. The reversal of 21231014 is 41013212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a self number, because there is not a number n which added to its sum of digits gives 21231014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14789 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (2321250).

Almost surely, 2^21231014 is an apocalyptic number.

21231014 is a deficient number, since it is larger than the sum of its proper divisors (15908986).

21231014 is an equidigital number, since it uses as much as digits as its factorization.

21231014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30972 (or 30958 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21231014 is about 4607.7124476252. The cubic root of 21231014 is about 276.9003973156.

Adding to 21231014 its reverse (41013212), we get a palindrome (62244226).

The spelling of 21231014 in words is "twenty-one million, two hundred thirty-one thousand, fourteen".