22222961 has 8 divisors (see below), whose sum is σ = 24342120. Its totient is φ = 20194048.

The previous prime is 22222957. The next prime is 22222973. The reversal of 22222961 is 16922222.

It can be written as a sum of positive squares in 4 ways, for example, as 6864400 + 15358561 = 2620^2 + 3919^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22222961 - 2² = 22222957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222961.

It is not an unprimeable number, because it can be changed into a prime (22222261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22046 + ... + 23031.

It is an arithmetic number, because the mean of its divisors is an integer number (3042765).

Almost surely, 2^22222961 is an apocalyptic number.

It is an amenable number.

22222961 is a deficient number, since it is larger than the sum of its proper divisors (2119159).

22222961 is a wasteful number, since it uses less digits than its factorization.

22222961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45123.

The product of its digits is 1728, while the sum is 26.

The square root of 22222961 is about 4714.1235664755. The cubic root of 22222961 is about 281.1473372793.

The spelling of 22222961 in words is "twenty-two million, two hundred twenty-two thousand, nine hundred sixty-one".