346161521 has 2 divisors, whose sum is σ = 346161522. Its totient is φ = 346161520.

The previous prime is 346161509. The next prime is 346161539. The reversal of 346161521 is 125161643.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316306225 + 29855296 = 17785^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 346161521 - 2¹⁸ = 345899377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (346161581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173080760 + 173080761.

It is an arithmetic number, because the mean of its divisors is an integer number (173080761).

Almost surely, 2^346161521 is an apocalyptic number.

It is an amenable number.

346161521 is a deficient number, since it is larger than the sum of its proper divisors (1).

346161521 is an equidigital number, since it uses as much as digits as its factorization.

346161521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 346161521 is about 18605.4164425309. The cubic root of 346161521 is about 702.1441203494.

The spelling of 346161521 in words is "three hundred forty-six million, one hundred sixty-one thousand, five hundred twenty-one".