281291855093 has 2 divisors, whose sum is σ = 281291855094. Its totient is φ = 281291855092.

The previous prime is 281291855069. The next prime is 281291855113. The reversal of 281291855093 is 390558192182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272544555364 + 8747299729 = 522058^2 + 93527^2 .

It is a cyclic number.

It is not a de Polignac number, because 281291855093 - 2³⁶ = 212572378357 is a prime.

It is a super-2 number, since 2×281291855093² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281291885093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140645927546 + 140645927547.

It is an arithmetic number, because the mean of its divisors is an integer number (140645927547).

Almost surely, 2^281291855093 is an apocalyptic number.

It is an amenable number.

281291855093 is a deficient number, since it is larger than the sum of its proper divisors (1).

281291855093 is an equidigital number, since it uses as much as digits as its factorization.

281291855093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 281291855093 in words is "two hundred eighty-one billion, two hundred ninety-one million, eight hundred fifty-five thousand, ninety-three".