22149813 has 24 divisors (see below), whose sum is σ = 35015328. Its totient is φ = 12413856.

The previous prime is 22149811. The next prime is 22149833. The reversal of 22149813 is 31894122.

It is not a de Polignac number, because 22149813 - 2¹ = 22149811 is a prime.

It is a super-2 number, since 2×22149813² = 981228431869938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22149811) 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, 6370 + ... + 9212.

It is an arithmetic number, because the mean of its divisors is an integer number (1458972).

Almost surely, 2^22149813 is an apocalyptic number.

It is an amenable number.

22149813 is a deficient number, since it is larger than the sum of its proper divisors (12865515).

22149813 is a wasteful number, since it uses less digits than its factorization.

22149813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913 (or 2906 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 22149813 is about 4706.3587836033. The cubic root of 22149813 is about 280.8385279842.

The spelling of 22149813 in words is "twenty-two million, one hundred forty-nine thousand, eight hundred thirteen".