351216502409 has 2 divisors, whose sum is σ = 351216502410. Its totient is φ = 351216502408.

The previous prime is 351216502397. The next prime is 351216502453. The reversal of 351216502409 is 904205612153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272818182400 + 78398320009 = 522320^2 + 279997^2 .

It is a cyclic number.

It is not a de Polignac number, because 351216502409 - 2³² = 346921535113 is a prime.

It is a super-2 number, since 2×351216502409² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (351216502459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175608251204 + 175608251205.

It is an arithmetic number, because the mean of its divisors is an integer number (175608251205).

Almost surely, 2^351216502409 is an apocalyptic number.

It is an amenable number.

351216502409 is a deficient number, since it is larger than the sum of its proper divisors (1).

351216502409 is an equidigital number, since it uses as much as digits as its factorization.

351216502409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 351216502409 in words is "three hundred fifty-one billion, two hundred sixteen million, five hundred two thousand, four hundred nine".