28157493000331 has 2 divisors, whose sum is σ = 28157493000332. Its totient is φ = 28157493000330.

The previous prime is 28157493000313. The next prime is 28157493000421. The reversal of 28157493000331 is 13300039475182.

Together with previous prime (28157493000313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28157493000331 - 2⁹ = 28157492999819 is a prime.

It is a super-2 number, since 2×28157493000331² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28157494000331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14078746500165 + 14078746500166.

It is an arithmetic number, because the mean of its divisors is an integer number (14078746500166).

Almost surely, 2^{28157493000331} is an apocalyptic number.

28157493000331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28157493000331 is an equidigital number, since it uses as much as digits as its factorization.

28157493000331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 28157493000331 in words is "twenty-eight trillion, one hundred fifty-seven billion, four hundred ninety-three million, three hundred thirty-one", and thus it is an aban number.