220408901 has 2 divisors, whose sum is σ = 220408902. Its totient is φ = 220408900.

The previous prime is 220408883. The next prime is 220408933. The reversal of 220408901 is 109804022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124858276 + 95550625 = 11174^2 + 9775^2 .

It is a cyclic number.

It is not a de Polignac number, because 220408901 - 2²² = 216214597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220408801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110204450 + 110204451.

It is an arithmetic number, because the mean of its divisors is an integer number (110204451).

Almost surely, 2^220408901 is an apocalyptic number.

It is an amenable number.

220408901 is a deficient number, since it is larger than the sum of its proper divisors (1).

220408901 is an equidigital number, since it uses as much as digits as its factorization.

220408901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 220408901 is about 14846.1746251349. The cubic root of 220408901 is about 604.0548509826.

The spelling of 220408901 in words is "two hundred twenty million, four hundred eight thousand, nine hundred one".