306340212505 has 4 divisors (see below), whose sum is σ = 367608255012. Its totient is φ = 245072170000.

The previous prime is 306340212499. The next prime is 306340212533. The reversal of 306340212505 is 505212043603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505212043603 = 503 ⋅1004397701.

It can be written as a sum of positive squares in 2 ways, for example, as 120873038224 + 185467174281 = 347668^2 + 430659^2 .

It is not a de Polignac number, because 306340212505 - 2⁵ = 306340212473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30634021246 + ... + 30634021255.

It is an arithmetic number, because the mean of its divisors is an integer number (91902063753).

Almost surely, 2^306340212505 is an apocalyptic number.

It is an amenable number.

306340212505 is a deficient number, since it is larger than the sum of its proper divisors (61268042507).

306340212505 is an equidigital number, since it uses as much as digits as its factorization.

306340212505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61268042506.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 306340212505 in words is "three hundred six billion, three hundred forty million, two hundred twelve thousand, five hundred five".