281550365123 has 2 divisors, whose sum is σ = 281550365124. Its totient is φ = 281550365122.

The previous prime is 281550365027. The next prime is 281550365137. The reversal of 281550365123 is 321563055182.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281550365123 - 2¹⁰ = 281550364099 is a prime.

It is a super-2 number, since 2×281550365123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (281550365623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140775182561 + 140775182562.

It is an arithmetic number, because the mean of its divisors is an integer number (140775182562).

Almost surely, 2^281550365123 is an apocalyptic number.

281550365123 is a deficient number, since it is larger than the sum of its proper divisors (1).

281550365123 is an equidigital number, since it uses as much as digits as its factorization.

281550365123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 281550365123 in words is "two hundred eighty-one billion, five hundred fifty million, three hundred sixty-five thousand, one hundred twenty-three".