351616121 has 2 divisors, whose sum is σ = 351616122. Its totient is φ = 351616120.

The previous prime is 351616103. The next prime is 351616129. The reversal of 351616121 is 121616153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255360400 + 96255721 = 15980^2 + 9811^2 .

It is a cyclic number.

It is not a de Polignac number, because 351616121 - 2²² = 347421817 is a prime.

It is not a weakly prime, because it can be changed into another prime (351616129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175808060 + 175808061.

It is an arithmetic number, because the mean of its divisors is an integer number (175808061).

Almost surely, 2^351616121 is an apocalyptic number.

It is an amenable number.

351616121 is a deficient number, since it is larger than the sum of its proper divisors (1).

351616121 is an equidigital number, since it uses as much as digits as its factorization.

351616121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 351616121 is about 18751.4298388150. The cubic root of 351616121 is about 705.8129020005.

The spelling of 351616121 in words is "three hundred fifty-one million, six hundred sixteen thousand, one hundred twenty-one".