381281774273 has 8 divisors (see below), whose sum is σ = 388524803688. Its totient is φ = 374040561024.

The previous prime is 381281774221. The next prime is 381281774347. The reversal of 381281774273 is 372477182183.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24906205489 + 356375568784 = 157817^2 + 596972^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381281774273 - 2¹⁴ = 381281757889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381281774213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26390 + ... + 873647.

It is an arithmetic number, because the mean of its divisors is an integer number (48565600461).

Almost surely, 2^381281774273 is an apocalyptic number.

It is an amenable number.

381281774273 is a deficient number, since it is larger than the sum of its proper divisors (7243029415).

381281774273 is an equidigital number, since it uses as much as digits as its factorization.

381281774273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908083.

The product of its digits is 3161088, while the sum is 53.

The spelling of 381281774273 in words is "three hundred eighty-one billion, two hundred eighty-one million, seven hundred seventy-four thousand, two hundred seventy-three".