220888901 has 2 divisors, whose sum is σ = 220888902. Its totient is φ = 220888900.

The previous prime is 220888873. The next prime is 220888907. The reversal of 220888901 is 109888022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143976001 + 76912900 = 11999^2 + 8770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220888901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220888907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110444450 + 110444451.

It is an arithmetic number, because the mean of its divisors is an integer number (110444451).

Almost surely, 2^220888901 is an apocalyptic number.

It is an amenable number.

220888901 is a deficient number, since it is larger than the sum of its proper divisors (1).

220888901 is an equidigital number, since it uses as much as digits as its factorization.

220888901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 220888901 is about 14862.3316138485. The cubic root of 220888901 is about 604.4930306607.

The spelling of 220888901 in words is "two hundred twenty million, eight hundred eighty-eight thousand, nine hundred one".