28234321931 has 2 divisors, whose sum is σ = 28234321932. Its totient is φ = 28234321930.

The previous prime is 28234321919. The next prime is 28234321963. The reversal of 28234321931 is 13912343282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28234321931 - 2³⁰ = 27160580107 is a prime.

It is a super-2 number, since 2×28234321931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28234321901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14117160965 + 14117160966.

It is an arithmetic number, because the mean of its divisors is an integer number (14117160966).

Almost surely, 2^28234321931 is an apocalyptic number.

28234321931 is a deficient number, since it is larger than the sum of its proper divisors (1).

28234321931 is an equidigital number, since it uses as much as digits as its factorization.

28234321931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The spelling of 28234321931 in words is "twenty-eight billion, two hundred thirty-four million, three hundred twenty-one thousand, nine hundred thirty-one".