21256202 has 8 divisors (see below), whose sum is σ = 34782912. Its totient is φ = 9661900.

The previous prime is 21256153. The next prime is 21256229. The reversal of 21256202 is 20265212.

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

It is a super-2 number, since 2×21256202² = 903652246929608, which contains 22 as substring.

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, 483074 + ... + 483117.

It is an arithmetic number, because the mean of its divisors is an integer number (4347864).

Almost surely, 2^21256202 is an apocalyptic number.

21256202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21256202 is a deficient number, since it is larger than the sum of its proper divisors (13526710).

21256202 is a wasteful number, since it uses less digits than its factorization.

21256202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966204.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21256202 is about 4610.4448809198. Note that the first 3 decimals coincide. The cubic root of 21256202 is about 277.0098568523.

The spelling of 21256202 in words is "twenty-one million, two hundred fifty-six thousand, two hundred two".