22331649 has 16 divisors (see below), whose sum is σ = 30497472. Its totient is φ = 14531328.

The previous prime is 22331633. The next prime is 22331651. The reversal of 22331649 is 94613322.

It is not a de Polignac number, because 22331649 - 2⁴ = 22331633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22331249) 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, 22957 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (1906092).

Almost surely, 2^22331649 is an apocalyptic number.

It is an amenable number.

22331649 is a deficient number, since it is larger than the sum of its proper divisors (8165823).

22331649 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (22331648) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1136).

22331649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its digits is 7776, while the sum is 30.

The square root of 22331649 is about 4725.6374173227. The cubic root of 22331649 is about 281.6049369682.

The spelling of 22331649 in words is "twenty-two million, three hundred thirty-one thousand, six hundred forty-nine".