21197314 has 4 divisors (see below), whose sum is σ = 31795974. Its totient is φ = 10598656.

The previous prime is 21197311. The next prime is 21197321. The reversal of 21197314 is 41379112.

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

It can be written as a sum of positive squares in only one way, i.e., 19954089 + 1243225 = 4467^2 + 1115^2 .

It is a super-2 number, since 2×21197314² = 898652241629192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21197311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5299327 + ... + 5299330.

Almost surely, 2^21197314 is an apocalyptic number.

21197314 is a deficient number, since it is larger than the sum of its proper divisors (10598660).

21197314 is a wasteful number, since it uses less digits than its factorization.

21197314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10598659.

The product of its digits is 1512, while the sum is 28.

The square root of 21197314 is about 4604.0540830881. The cubic root of 21197314 is about 276.7538116796.

The spelling of 21197314 in words is "twenty-one million, one hundred ninety-seven thousand, three hundred fourteen".