21227010 has 32 divisors (see below), whose sum is σ = 58223232. Its totient is φ = 4851840.

The previous prime is 21226969. The next prime is 21227023. The reversal of 21227010 is 1072212.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 50331 + ... + 50750.

It is an arithmetic number, because the mean of its divisors is an integer number (1819476).

Almost surely, 2^21227010 is an apocalyptic number.

21227010 is an abundant number, since it is smaller than the sum of its proper divisors (36996222).

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

21227010 is a wasteful number, since it uses less digits than its factorization.

21227010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101098.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 21227010 is about 4607.2779382191. The cubic root of 21227010 is about 276.8829891520.

Adding to 21227010 its reverse (1072212), we get a palindrome (22299222).

The spelling of 21227010 in words is "twenty-one million, two hundred twenty-seven thousand, ten".