340215020491 has 4 divisors (see below), whose sum is σ = 340740855792. Its totient is φ = 339689185192.

The previous prime is 340215020477. The next prime is 340215020531. The reversal of 340215020491 is 194020512043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194020512043 = 19 ⋅10211605897.

It is a cyclic number.

It is not a de Polignac number, because 340215020491 - 2⁵ = 340215020459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340215020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262916680 + ... + 262917973.

It is an arithmetic number, because the mean of its divisors is an integer number (85185213948).

Almost surely, 2^340215020491 is an apocalyptic number.

340215020491 is a deficient number, since it is larger than the sum of its proper divisors (525835301).

340215020491 is an equidigital number, since it uses as much as digits as its factorization.

340215020491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525835300.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 340215020491 in words is "three hundred forty billion, two hundred fifteen million, twenty thousand, four hundred ninety-one".