21014231 has 8 divisors (see below), whose sum is σ = 24072480. Its totient is φ = 17970048.

The previous prime is 21014179. The next prime is 21014233. The reversal of 21014231 is 13241012.

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 21014231 - 2⁶ = 21014167 is a prime.

It is a super-2 number, since 2×21014231² = 883195809042722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014233) 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, 86 + ... + 6483.

It is an arithmetic number, because the mean of its divisors is an integer number (3009060).

Almost surely, 2^21014231 is an apocalyptic number.

21014231 is a deficient number, since it is larger than the sum of its proper divisors (3058249).

21014231 is an equidigital number, since it uses as much as digits as its factorization.

21014231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21014231 is about 4584.1281613847. The cubic root of 21014231 is about 275.9547245975.

Adding to 21014231 its reverse (13241012), we get a palindrome (34255243).

It can be divided in two parts, 210 and 14231, that added together give a palindrome (14441).

The spelling of 21014231 in words is "twenty-one million, fourteen thousand, two hundred thirty-one".