281556097453 has 2 divisors, whose sum is σ = 281556097454. Its totient is φ = 281556097452.

The previous prime is 281556097429. The next prime is 281556097499. The reversal of 281556097453 is 354790655182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281140671529 + 415425924 = 530227^2 + 20382^2 .

It is a cyclic number.

It is not a de Polignac number, because 281556097453 - 2²⁵ = 281522543021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281556097394 and 281556097403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281556097153) 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, 140778048726 + 140778048727.

It is an arithmetic number, because the mean of its divisors is an integer number (140778048727).

It is a 1-persistent number, because it is pandigital, but 2⋅281556097453 = 563112194906 is not.

Almost surely, 2^281556097453 is an apocalyptic number.

It is an amenable number.

281556097453 is a deficient number, since it is larger than the sum of its proper divisors (1).

281556097453 is an equidigital number, since it uses as much as digits as its factorization.

281556097453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 55.

The spelling of 281556097453 in words is "two hundred eighty-one billion, five hundred fifty-six million, ninety-seven thousand, four hundred fifty-three".