21625214 has 8 divisors (see below), whose sum is σ = 34933080. Its totient is φ = 9980856.

The previous prime is 21625199. The next prime is 21625229. The reversal of 21625214 is 41252612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21625199) and next prime (21625229).

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21625214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415844 + ... + 415895.

It is an arithmetic number, because the mean of its divisors is an integer number (4366635).

Almost surely, 2^21625214 is an apocalyptic number.

21625214 is a deficient number, since it is larger than the sum of its proper divisors (13307866).

21625214 is a wasteful number, since it uses less digits than its factorization.

21625214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831754.

The product of its digits is 960, while the sum is 23.

The square root of 21625214 is about 4650.2918188002. The cubic root of 21625214 is about 278.6036517874.

Adding to 21625214 its reverse (41252612), we get a palindrome (62877826).

The spelling of 21625214 in words is "twenty-one million, six hundred twenty-five thousand, two hundred fourteen".