2051123351 has 4 divisors (see below), whose sum is σ = 2051897400. Its totient is φ = 2050349304.

The previous prime is 2051123317. The next prime is 2051123363. The reversal of 2051123351 is 1533211502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1533211502 = 2 ⋅766605751.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051123351 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 (2051123551) 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, 383036 + ... + 388353.

It is an arithmetic number, because the mean of its divisors is an integer number (512974350).

Almost surely, 2^2051123351 is an apocalyptic number.

2051123351 is a deficient number, since it is larger than the sum of its proper divisors (774049).

2051123351 is an equidigital number, since it uses as much as digits as its factorization.

2051123351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774048.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2051123351 is about 45289.3293282204. The cubic root of 2051123351 is about 1270.5660879746.

Adding to 2051123351 its reverse (1533211502), we get a palindrome (3584334853).

The spelling of 2051123351 in words is "two billion, fifty-one million, one hundred twenty-three thousand, three hundred fifty-one".