21622150 has 24 divisors (see below), whose sum is σ = 43874424. Its totient is φ = 7862400.

The previous prime is 21622141. The next prime is 21622151. The reversal of 21622150 is 5122612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21622151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19107 + ... + 20206.

It is an arithmetic number, because the mean of its divisors is an integer number (1828101).

Almost surely, 2^21622150 is an apocalyptic number.

21622150 is an abundant number, since it is smaller than the sum of its proper divisors (22252274).

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

21622150 is a wasteful number, since it uses less digits than its factorization.

21622150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39336 (or 39331 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 21622150 is about 4649.9623654391. The cubic root of 21622150 is about 278.5904930442.

Adding to 21622150 its reverse (5122612), we get a palindrome (26744762).

It can be divided in two parts, 216 and 22150, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 21622150 in words is "twenty-one million, six hundred twenty-two thousand, one hundred fifty".