22172649 has 8 divisors (see below), whose sum is σ = 30251232. Its totient is φ = 14437920.

The previous prime is 22172627. The next prime is 22172653. The reversal of 22172649 is 94627122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22172649 - 2¹⁵ = 22139881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22172609) 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 7 ways as a sum of consecutive naturals, for example, 85812 + ... + 86069.

It is an arithmetic number, because the mean of its divisors is an integer number (3781404).

Almost surely, 2^22172649 is an apocalyptic number.

It is an amenable number.

22172649 is a deficient number, since it is larger than the sum of its proper divisors (8078583).

22172649 is a wasteful number, since it uses less digits than its factorization.

22172649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171927.

The product of its digits is 12096, while the sum is 33.

The square root of 22172649 is about 4708.7842379960. The cubic root of 22172649 is about 280.9350077441.

The spelling of 22172649 in words is "twenty-two million, one hundred seventy-two thousand, six hundred forty-nine".