351312161 has 2 divisors, whose sum is σ = 351312162. Its totient is φ = 351312160.

The previous prime is 351312121. The next prime is 351312187. The reversal of 351312161 is 161213153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208629136 + 142683025 = 14444^2 + 11945^2 .

It is a cyclic number.

It is not a de Polignac number, because 351312161 - 2²² = 347117857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (351312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175656080 + 175656081.

It is an arithmetic number, because the mean of its divisors is an integer number (175656081).

Almost surely, 2^351312161 is an apocalyptic number.

It is an amenable number.

351312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

351312161 is an equidigital number, since it uses as much as digits as its factorization.

351312161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 351312161 is about 18743.3231045084. The cubic root of 351312161 is about 705.6094597358.

The spelling of 351312161 in words is "three hundred fifty-one million, three hundred twelve thousand, one hundred sixty-one".