22299921 has 16 divisors (see below), whose sum is σ = 37756800. Its totient is φ = 12742704.

The previous prime is 22299919. The next prime is 22299923. The reversal of 22299921 is 12999222.

It is an interprime number because it is at equal distance from previous prime (22299919) and next prime (22299923).

It is not a de Polignac number, because 22299921 - 2¹ = 22299919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22299923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58806 + ... + 59183.

It is an arithmetic number, because the mean of its divisors is an integer number (2359800).

Almost surely, 2^22299921 is an apocalyptic number.

22299921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22299921 is a deficient number, since it is larger than the sum of its proper divisors (15456879).

22299921 is a wasteful number, since it uses less digits than its factorization.

22299921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118005 (or 117999 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 22299921 is about 4722.2792166495. The cubic root of 22299921 is about 281.4715090519.

It can be divided in two parts, 22299 and 921, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 22299921 in words is "twenty-two million, two hundred ninety-nine thousand, nine hundred twenty-one".