21226059 has 24 divisors (see below), whose sum is σ = 32619600. Its totient is φ = 13262400.

The previous prime is 21226039. The next prime is 21226063. The reversal of 21226059 is 95062212.

It is not a de Polignac number, because 21226059 - 2⁵ = 21226027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21226019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16657 + ... + 17885.

It is an arithmetic number, because the mean of its divisors is an integer number (1359150).

Almost surely, 2^21226059 is an apocalyptic number.

21226059 is a deficient number, since it is larger than the sum of its proper divisors (11393541).

21226059 is a wasteful number, since it uses less digits than its factorization.

21226059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21226059 is about 4607.1747307868. The cubic root of 21226059 is about 276.8788541741.

The spelling of 21226059 in words is "twenty-one million, two hundred twenty-six thousand, fifty-nine".