21114255 has 32 divisors (see below), whose sum is σ = 36937728. Its totient is φ = 10252800.

The previous prime is 21114241. The next prime is 21114257. The reversal of 21114255 is 55241112.

It is not a de Polignac number, because 21114255 - 2⁷ = 21114127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6570 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1154304).

Almost surely, 2^21114255 is an apocalyptic number.

21114255 is a deficient number, since it is larger than the sum of its proper divisors (15823473).

21114255 is a wasteful number, since it uses less digits than its factorization.

21114255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727.

The product of its digits is 400, while the sum is 21.

The square root of 21114255 is about 4595.0250271353. The cubic root of 21114255 is about 276.3918635554.

Adding to 21114255 its reverse (55241112), we get a palindrome (76355367).

The spelling of 21114255 in words is "twenty-one million, one hundred fourteen thousand, two hundred fifty-five".