306506001205 has 4 divisors (see below), whose sum is σ = 367807201452. Its totient is φ = 245204800960.

The previous prime is 306506001203. The next prime is 306506001211. The reversal of 306506001205 is 502100605603.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502100605603 = 141397 ⋅3550999.

It can be written as a sum of positive squares in 2 ways, for example, as 154211719204 + 152294282001 = 392698^2 + 390249^2 .

It is not a de Polignac number, because 306506001205 - 2¹ = 306506001203 is a prime.

It is a super-2 number, since 2×306506001205² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306506001203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30650600116 + ... + 30650600125.

It is an arithmetic number, because the mean of its divisors is an integer number (91951800363).

Almost surely, 2^306506001205 is an apocalyptic number.

It is an amenable number.

306506001205 is a deficient number, since it is larger than the sum of its proper divisors (61301200247).

306506001205 is an equidigital number, since it uses as much as digits as its factorization.

306506001205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61301200246.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 306506001205 its reverse (502100605603), we get a palindrome (808606606808).

The spelling of 306506001205 in words is "three hundred six billion, five hundred six million, one thousand, two hundred five".