2151434305 has 8 divisors (see below), whose sum is σ = 2582289000. Its totient is φ = 1720768896.

The previous prime is 2151434297. The next prime is 2151434309. The reversal of 2151434305 is 5034341512.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 2134070416 = 4167^2 + 46196^2 .

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 2151434305 - 2³ = 2151434297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2151434309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20980 + ... + 68869.

It is an arithmetic number, because the mean of its divisors is an integer number (322786125).

Almost surely, 2^2151434305 is an apocalyptic number.

It is an amenable number.

2151434305 is a deficient number, since it is larger than the sum of its proper divisors (430854695).

2151434305 is an equidigital number, since it uses as much as digits as its factorization.

2151434305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94643.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2151434305 is about 46383.5564074166. The cubic root of 2151434305 is about 1290.9498252815.

Adding to 2151434305 its reverse (5034341512), we get a palindrome (7185775817).

The spelling of 2151434305 in words is "two billion, one hundred fifty-one million, four hundred thirty-four thousand, three hundred five".