2051231011 has 16 divisors (see below), whose sum is σ = 2189491200. Its totient is φ = 1918065864.

The previous prime is 2051231009. The next prime is 2051231029. The reversal of 2051231011 is 1101321502.

It is not a de Polignac number, because 2051231011 - 2¹ = 2051231009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051231081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2387500 + ... + 2388358.

It is an arithmetic number, because the mean of its divisors is an integer number (136843200).

Almost surely, 2^2051231011 is an apocalyptic number.

2051231011 is a deficient number, since it is larger than the sum of its proper divisors (138260189).

2051231011 is an frugal number, since it uses more digits than its factorization.

2051231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2051231011 is about 45290.5178928217. The cubic root of 2051231011 is about 1270.5883175416.

Adding to 2051231011 its reverse (1101321502), we get a palindrome (3152552513).

The spelling of 2051231011 in words is "two billion, fifty-one million, two hundred thirty-one thousand, eleven".