22178801 has 2 divisors, whose sum is σ = 22178802. Its totient is φ = 22178800.

The previous prime is 22178797. The next prime is 22178803. The reversal of 22178801 is 10887122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 9928801 = 3500^2 + 3151^2 .

It is a cyclic number.

It is not a de Polignac number, because 22178801 - 2² = 22178797 is a prime.

Together with 22178803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22178803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11089400 + 11089401.

It is an arithmetic number, because the mean of its divisors is an integer number (11089401).

Almost surely, 2^22178801 is an apocalyptic number.

It is an amenable number.

22178801 is a deficient number, since it is larger than the sum of its proper divisors (1).

22178801 is an equidigital number, since it uses as much as digits as its factorization.

22178801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 22178801 is about 4709.4374398648. The cubic root of 22178801 is about 280.9609879859.

The spelling of 22178801 in words is "twenty-two million, one hundred seventy-eight thousand, eight hundred one".