21301302 has 16 divisors (see below), whose sum is σ = 46475712. Its totient is φ = 6454920.

The previous prime is 21301279. The next prime is 21301321. The reversal of 21301302 is 20310312.

It is a happy number.

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, 161308 + ... + 161439.

It is an arithmetic number, because the mean of its divisors is an integer number (2904732).

Almost surely, 2^21301302 is an apocalyptic number.

21301302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21301302 is an abundant number, since it is smaller than the sum of its proper divisors (25174410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301302 is a wasteful number, since it uses less digits than its factorization.

21301302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322763.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21301302 is about 4615.3333574077. Note that the first 4 decimals coincide. The cubic root of 21301302 is about 277.2056321721.

Adding to 21301302 its reverse (20310312), we get a palindrome (41611614).

The spelling of 21301302 in words is "twenty-one million, three hundred one thousand, three hundred two".