2051115431 has 2 divisors, whose sum is σ = 2051115432. Its totient is φ = 2051115430.

The previous prime is 2051115427. The next prime is 2051115439. The reversal of 2051115431 is 1345111502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2051115431 - 2² = 2051115427 is a prime.

It is a super-2 number, since 2×2051115431² = 8414149022572631522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2051115397 and 2051115406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051115439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025557715 + 1025557716.

It is an arithmetic number, because the mean of its divisors is an integer number (1025557716).

Almost surely, 2^2051115431 is an apocalyptic number.

2051115431 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051115431 is an equidigital number, since it uses as much as digits as its factorization.

2051115431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 2051115431 is about 45289.2418903209. The cubic root of 2051115431 is about 1270.5644526274.

Adding to 2051115431 its reverse (1345111502), we get a palindrome (3396226933).

The spelling of 2051115431 in words is "two billion, fifty-one million, one hundred fifteen thousand, four hundred thirty-one".