21143202 has 16 divisors (see below), whose sum is σ = 42541632. Its totient is φ = 7005200.

The previous prime is 21143201. The next prime is 21143203. The reversal of 21143202 is 20234112.

It is an interprime number because it is at equal distance from previous prime (21143201) and next prime (21143203).

It is a super-3 number, since 3×21143202³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21143201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9549 + ... + 11552.

It is an arithmetic number, because the mean of its divisors is an integer number (2658852).

Almost surely, 2^21143202 is an apocalyptic number.

21143202 is an abundant number, since it is smaller than the sum of its proper divisors (21398430).

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

21143202 is a wasteful number, since it uses less digits than its factorization.

21143202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21273.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 21143202 is about 4598.1737679213. The cubic root of 21143202 is about 276.5181141511.

Adding to 21143202 its reverse (20234112), we get a palindrome (41377314).

The spelling of 21143202 in words is "twenty-one million, one hundred forty-three thousand, two hundred two".