222997001 has 2 divisors, whose sum is σ = 222997002. Its totient is φ = 222997000.

The previous prime is 222996997. The next prime is 222997003. The reversal of 222997001 is 100799222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154355776 + 68641225 = 12424^2 + 8285^2 .

It is a cyclic number.

It is not a de Polignac number, because 222997001 - 2² = 222996997 is a prime.

Together with 222997003, 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 (222997003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111498500 + 111498501.

It is an arithmetic number, because the mean of its divisors is an integer number (111498501).

Almost surely, 2^222997001 is an apocalyptic number.

It is an amenable number.

222997001 is a deficient number, since it is larger than the sum of its proper divisors (1).

222997001 is an equidigital number, since it uses as much as digits as its factorization.

222997001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 222997001 is about 14933.0841087834. The cubic root of 222997001 is about 606.4099810055.

The spelling of 222997001 in words is "two hundred twenty-two million, nine hundred ninety-seven thousand, one".