21227410 has 8 divisors (see below), whose sum is σ = 38209356. Its totient is φ = 8490960.

The previous prime is 21227399. The next prime is 21227419. The reversal of 21227410 is 1472212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20875761 + 351649 = 4569^2 + 593^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21227419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061361 + ... + 1061380.

Almost surely, 2^21227410 is an apocalyptic number.

21227410 is a deficient number, since it is larger than the sum of its proper divisors (16981946).

21227410 is a wasteful number, since it uses less digits than its factorization.

21227410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122748.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21227410 is about 4607.3213475945. The cubic root of 21227410 is about 276.8847283277.

Adding to 21227410 its reverse (1472212), we get a palindrome (22699622).

The spelling of 21227410 in words is "twenty-one million, two hundred twenty-seven thousand, four hundred ten".