21225068 has 6 divisors (see below), whose sum is σ = 37143876. Its totient is φ = 10612532.

The previous prime is 21225047. The next prime is 21225077. The reversal of 21225068 is 86052212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2653130 + ... + 2653137.

It is an arithmetic number, because the mean of its divisors is an integer number (6190646).

Almost surely, 2^21225068 is an apocalyptic number.

It is an amenable number.

21225068 is a deficient number, since it is larger than the sum of its proper divisors (15918808).

21225068 is a wasteful number, since it uses less digits than its factorization.

21225068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306271 (or 5306269 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 21225068 is about 4607.0671798879. The cubic root of 21225068 is about 276.8745451434.

The spelling of 21225068 in words is "twenty-one million, two hundred twenty-five thousand, sixty-eight".