21514213 has 8 divisors (see below), whose sum is σ = 25881920. Its totient is φ = 17470080.

The previous prime is 21514211. The next prime is 21514247. The reversal of 21514213 is 31241512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21514213 - 2¹ = 21514211 is a prime.

It is a super-2 number, since 2×21514213² = 925722722018738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80748 + ... + 81013.

It is an arithmetic number, because the mean of its divisors is an integer number (3235240).

Almost surely, 2^21514213 is an apocalyptic number.

It is an amenable number.

21514213 is a deficient number, since it is larger than the sum of its proper divisors (4367707).

21514213 is a wasteful number, since it uses less digits than its factorization.

21514213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161787.

The product of its digits is 240, while the sum is 19.

The square root of 21514213 is about 4638.3416217437. The cubic root of 21514213 is about 278.1261482594.

Adding to 21514213 its reverse (31241512), we get a palindrome (52755725).

The spelling of 21514213 in words is "twenty-one million, five hundred fourteen thousand, two hundred thirteen".