21514285 has 16 divisors (see below), whose sum is σ = 27901440. Its totient is φ = 15831360.

The previous prime is 21514249. The next prime is 21514301. The reversal of 21514285 is 58241512.

It is not a de Polignac number, because 21514285 - 2⁹ = 21513773 is a prime.

It is a super-2 number, since 2×21514285² = 925728918122450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30790 + ... + 31480.

It is an arithmetic number, because the mean of its divisors is an integer number (1743840).

Almost surely, 2^21514285 is an apocalyptic number.

It is an amenable number.

21514285 is a deficient number, since it is larger than the sum of its proper divisors (6387155).

21514285 is a wasteful number, since it uses less digits than its factorization.

21514285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 3200, while the sum is 28.

The square root of 21514285 is about 4638.3493831319. The cubic root of 21514285 is about 278.1264585203.

Adding to 21514285 its reverse (58241512), we get a palindrome (79755797).

The spelling of 21514285 in words is "twenty-one million, five hundred fourteen thousand, two hundred eighty-five".