281065313938 has 4 divisors (see below), whose sum is σ = 421597970910. Its totient is φ = 140532656968.

The previous prime is 281065313929. The next prime is 281065313981. The reversal of 281065313938 is 839313560182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 272721039529 + 8344274409 = 522227^2 + 91347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 281065313891 and 281065313900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70266328483 + ... + 70266328486.

Almost surely, 2^281065313938 is an apocalyptic number.

281065313938 is a deficient number, since it is larger than the sum of its proper divisors (140532656972).

281065313938 is a wasteful number, since it uses less digits than its factorization.

281065313938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140532656971.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 281065313938 in words is "two hundred eighty-one billion, sixty-five million, three hundred thirteen thousand, nine hundred thirty-eight".