2051123405 has 8 divisors (see below), whose sum is σ = 2461666272. Its totient is φ = 1640686608.

The previous prime is 2051123363. The next prime is 2051123407. The reversal of 2051123405 is 5043211502.

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 2051123405 - 2⁸ = 2051123149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051123407) 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, 25202 + ... + 68828.

It is an arithmetic number, because the mean of its divisors is an integer number (307708284).

Almost surely, 2^2051123405 is an apocalyptic number.

It is an amenable number.

2051123405 is a deficient number, since it is larger than the sum of its proper divisors (410542867).

2051123405 is an equidigital number, since it uses as much as digits as its factorization.

2051123405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53035.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2051123405 is about 45289.3299243873. The cubic root of 2051123405 is about 1270.5660991247.

Adding to 2051123405 its reverse (5043211502), we get a palindrome (7094334907).

The spelling of 2051123405 in words is "two billion, fifty-one million, one hundred twenty-three thousand, four hundred five".