353350021 has 2 divisors, whose sum is σ = 353350022. Its totient is φ = 353350020.

The previous prime is 353349991. The next prime is 353350043. The reversal of 353350021 is 120053353.

It is a happy number.

It is an a-pointer prime, because the next prime (353350043) can be obtained adding 353350021 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342657121 + 10692900 = 18511^2 + 3270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-353350021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 353349974 and 353350001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (353357021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176675010 + 176675011.

It is an arithmetic number, because the mean of its divisors is an integer number (176675011).

Almost surely, 2^353350021 is an apocalyptic number.

It is an amenable number.

353350021 is a deficient number, since it is larger than the sum of its proper divisors (1).

353350021 is an equidigital number, since it uses as much as digits as its factorization.

353350021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 353350021 is about 18797.6067891633. The cubic root of 353350021 is about 706.9711754535.

The spelling of 353350021 in words is "three hundred fifty-three million, three hundred fifty thousand, twenty-one".