340216523 has 2 divisors, whose sum is σ = 340216524. Its totient is φ = 340216522.

The previous prime is 340216507. The next prime is 340216543. The reversal of 340216523 is 325612043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340216523 - 2⁴ = 340216507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 340216492 and 340216501.

It is not a weakly prime, because it can be changed into another prime (340216543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170108261 + 170108262.

It is an arithmetic number, because the mean of its divisors is an integer number (170108262).

Almost surely, 2^340216523 is an apocalyptic number.

340216523 is a deficient number, since it is larger than the sum of its proper divisors (1).

340216523 is an equidigital number, since it uses as much as digits as its factorization.

340216523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 340216523 is about 18444.9592843140. The cubic root of 340216523 is about 698.1013329782.

Adding to 340216523 its reverse (325612043), we get a palindrome (665828566).

The spelling of 340216523 in words is "three hundred forty million, two hundred sixteen thousand, five hundred twenty-three".