2051243431 has 8 divisors (see below), whose sum is σ = 2164479840. Its totient is φ = 1940011392.

The previous prime is 2051243417. The next prime is 2051243449. The reversal of 2051243431 is 1343421502.

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 2051243431 - 2¹⁵ = 2051210663 is a prime.

It is a super-2 number, since 2×2051243431² = 8415199226441303522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2051243396 and 2051243405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051243531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498990 + ... + 503083.

It is an arithmetic number, because the mean of its divisors is an integer number (270559980).

Almost surely, 2^2051243431 is an apocalyptic number.

2051243431 is a deficient number, since it is larger than the sum of its proper divisors (113236409).

2051243431 is a wasteful number, since it uses less digits than its factorization.

2051243431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002185.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2051243431 is about 45290.6550074074. The cubic root of 2051243431 is about 1270.5908819651.

Adding to 2051243431 its reverse (1343421502), we get a palindrome (3394664933).

The spelling of 2051243431 in words is "two billion, fifty-one million, two hundred forty-three thousand, four hundred thirty-one".