2028538923251 has 2 divisors, whose sum is σ = 2028538923252. Its totient is φ = 2028538923250.

The previous prime is 2028538923193. The next prime is 2028538923311. The reversal of 2028538923251 is 1523298358202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2028538923251 is a prime.

It is a super-2 number, since 2×2028538923251² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028538923251.

It is not a weakly prime, because it can be changed into another prime (2028538922251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014269461625 + 1014269461626.

It is an arithmetic number, because the mean of its divisors is an integer number (1014269461626).

Almost surely, 2^{2028538923251} is an apocalyptic number.

2028538923251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028538923251 is an equidigital number, since it uses as much as digits as its factorization.

2028538923251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 2028538923251 in words is "two trillion, twenty-eight billion, five hundred thirty-eight million, nine hundred twenty-three thousand, two hundred fifty-one".