352207021 has 2 divisors, whose sum is σ = 352207022. Its totient is φ = 352207020.

The previous prime is 352207019. The next prime is 352207057. The reversal of 352207021 is 120702253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352125225 + 81796 = 18765^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 352207021 - 2¹ = 352207019 is a prime.

Together with 352207019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 352206983 and 352207001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (352207081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176103510 + 176103511.

It is an arithmetic number, because the mean of its divisors is an integer number (176103511).

Almost surely, 2^352207021 is an apocalyptic number.

It is an amenable number.

352207021 is a deficient number, since it is larger than the sum of its proper divisors (1).

352207021 is an equidigital number, since it uses as much as digits as its factorization.

352207021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 352207021 is about 18767.1793565256. The cubic root of 352207021 is about 706.2080596808.

Adding to 352207021 its reverse (120702253), we get a palindrome (472909274).

The spelling of 352207021 in words is "three hundred fifty-two million, two hundred seven thousand, twenty-one".