21248622 has 32 divisors (see below), whose sum is σ = 48322560. Its totient is φ = 6917400.

The previous prime is 21248599. The next prime is 21248639. The reversal of 21248622 is 22684212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2254 + ... + 6897.

It is an arithmetic number, because the mean of its divisors is an integer number (1510080).

Almost surely, 2^21248622 is an apocalyptic number.

21248622 is an abundant number, since it is smaller than the sum of its proper divisors (27073938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21248622 is a wasteful number, since it uses less digits than its factorization.

21248622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9205 (or 9199 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 21248622 is about 4609.6227611378. The cubic root of 21248622 is about 276.9769255326.

The spelling of 21248622 in words is "twenty-one million, two hundred forty-eight thousand, six hundred twenty-two".