22372001 has 2 divisors, whose sum is σ = 22372002. Its totient is φ = 22372000.

The previous prime is 22371977. The next prime is 22372003. The reversal of 22372001 is 10027322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 10086976 = 3505^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 22372001 - 2²² = 18177697 is a prime.

Together with 22372003, 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 (22372003) 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 as a sum of consecutive naturals, namely, 11186000 + 11186001.

It is an arithmetic number, because the mean of its divisors is an integer number (11186001).

Almost surely, 2^22372001 is an apocalyptic number.

It is an amenable number.

22372001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22372001 is an equidigital number, since it uses as much as digits as its factorization.

22372001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 22372001 is about 4729.9049673329. The cubic root of 22372001 is about 281.7744495285.

Adding to 22372001 its reverse (10027322), we get a palindrome (32399323).

The spelling of 22372001 in words is "twenty-two million, three hundred seventy-two thousand, one".