2028511931 has 2 divisors, whose sum is σ = 2028511932. Its totient is φ = 2028511930.

The previous prime is 2028511921. The next prime is 2028511943. The reversal of 2028511931 is 1391158202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2028511931 - 2³⁰ = 954770107 is a prime.

It is a super-2 number, since 2×2028511931² = 8229721308418697522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2028511921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014255965 + 1014255966.

It is an arithmetic number, because the mean of its divisors is an integer number (1014255966).

Almost surely, 2^2028511931 is an apocalyptic number.

2028511931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028511931 is an equidigital number, since it uses as much as digits as its factorization.

2028511931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 2028511931 is about 45039.0045516106. The cubic root of 2028511931 is about 1265.8799526706.

The spelling of 2028511931 in words is "two billion, twenty-eight million, five hundred eleven thousand, nine hundred thirty-one".