21314051 has 4 divisors (see below), whose sum is σ = 23251704. Its totient is φ = 19376400.

The previous prime is 21314011. The next prime is 21314053. The reversal of 21314051 is 15041312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21314051 - 2¹⁴ = 21297667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21314053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968810 + ... + 968831.

It is an arithmetic number, because the mean of its divisors is an integer number (5812926).

Almost surely, 2^21314051 is an apocalyptic number.

21314051 is a deficient number, since it is larger than the sum of its proper divisors (1937653).

21314051 is a wasteful number, since it uses less digits than its factorization.

21314051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937652.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21314051 is about 4616.7143078168. The cubic root of 21314051 is about 277.2609244070.

Adding to 21314051 its reverse (15041312), we get a palindrome (36355363).

The spelling of 21314051 in words is "twenty-one million, three hundred fourteen thousand, fifty-one".