21627122 has 16 divisors (see below), whose sum is σ = 35504352. Its totient is φ = 9798720.

The previous prime is 21627113. The next prime is 21627139. The reversal of 21627122 is 22172612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6218 + ... + 9050.

It is an arithmetic number, because the mean of its divisors is an integer number (2219022).

Almost surely, 2^21627122 is an apocalyptic number.

21627122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21627122 is a deficient number, since it is larger than the sum of its proper divisors (13877230).

21627122 is a wasteful number, since it uses less digits than its factorization.

21627122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193.

The product of its digits is 672, while the sum is 23.

The square root of 21627122 is about 4650.4969626912. The cubic root of 21627122 is about 278.6118453114.

Adding to 21627122 its reverse (22172612), we get a palindrome (43799734).

Subtracting 21627122 from its reverse (22172612), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 21627122 in words is "twenty-one million, six hundred twenty-seven thousand, one hundred twenty-two".