2106356305 has 8 divisors (see below), whose sum is σ = 2529718632. Its totient is φ = 1683691008.

The previous prime is 2106356293. The next prime is 2106356363. The reversal of 2106356305 is 5036536012.

It can be written as a sum of positive squares in 4 ways, for example, as 171060241 + 1935296064 = 13079^2 + 43992^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2106356305 - 2¹⁵ = 2106323537 is a prime.

It is a super-2 number, since 2×2106356305² = 8873473767226506050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167584 + ... + 179713.

It is an arithmetic number, because the mean of its divisors is an integer number (316214829).

Almost surely, 2^2106356305 is an apocalyptic number.

It is an amenable number.

2106356305 is a deficient number, since it is larger than the sum of its proper divisors (423362327).

2106356305 is a wasteful number, since it uses less digits than its factorization.

2106356305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348515.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 2106356305 is about 45895.0575225699. The cubic root of 2106356305 is about 1281.8698876910.

The spelling of 2106356305 in words is "two billion, one hundred six million, three hundred fifty-six thousand, three hundred five".