21914229 has 8 divisors (see below), whose sum is σ = 29251872. Its totient is φ = 14593040.

The previous prime is 21914197. The next prime is 21914251. The reversal of 21914229 is 92241912.

It is a happy number.

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 21914229 - 2⁵ = 21914197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21914196 and 21914205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914029) 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 7 ways as a sum of consecutive naturals, for example, 567 + ... + 6644.

It is an arithmetic number, because the mean of its divisors is an integer number (3656484).

Almost surely, 2^21914229 is an apocalyptic number.

It is an amenable number.

21914229 is a deficient number, since it is larger than the sum of its proper divisors (7337643).

21914229 is a wasteful number, since it uses less digits than its factorization.

21914229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8227.

The product of its digits is 2592, while the sum is 30.

The square root of 21914229 is about 4681.2636114622. The cubic root of 21914229 is about 279.8393168202.

The spelling of 21914229 in words is "twenty-one million, nine hundred fourteen thousand, two hundred twenty-nine".