2151350405 has 4 divisors (see below), whose sum is σ = 2581620492. Its totient is φ = 1721080320.

The previous prime is 2151350389. The next prime is 2151350477. The reversal of 2151350405 is 5040531512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 652189444 + 1499160961 = 25538^2 + 38719^2 .

It is not a de Polignac number, because 2151350405 - 2⁴ = 2151350389 is a prime.

It is a Duffinian number.

It is a congruent 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, 215135036 + ... + 215135045.

It is an arithmetic number, because the mean of its divisors is an integer number (645405123).

Almost surely, 2^2151350405 is an apocalyptic number.

It is an amenable number.

2151350405 is a deficient number, since it is larger than the sum of its proper divisors (430270087).

2151350405 is an equidigital number, since it uses as much as digits as its factorization.

2151350405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430270086.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2151350405 is about 46382.6519832577. The cubic root of 2151350405 is about 1290.9330439033.

Adding to 2151350405 its reverse (5040531512), we get a palindrome (7191881917).

The spelling of 2151350405 in words is "two billion, one hundred fifty-one million, three hundred fifty thousand, four hundred five".