21314555 has 8 divisors (see below), whose sum is σ = 25938144. Its totient is φ = 16811200.

The previous prime is 21314551. The next prime is 21314567. The reversal of 21314555 is 55541312.

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

It is not a de Polignac number, because 21314555 - 2² = 21314551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21314551) 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, 29666 + ... + 30375.

It is an arithmetic number, because the mean of its divisors is an integer number (3242268).

Almost surely, 2^21314555 is an apocalyptic number.

21314555 is a deficient number, since it is larger than the sum of its proper divisors (4623589).

21314555 is an equidigital number, since it uses as much as digits as its factorization.

21314555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60117.

The product of its digits is 3000, while the sum is 26.

The square root of 21314555 is about 4616.7688917684. The cubic root of 21314555 is about 277.2631097948.

Adding to 21314555 its reverse (55541312), we get a palindrome (76855867).

The spelling of 21314555 in words is "twenty-one million, three hundred fourteen thousand, five hundred fifty-five".