349842135281 has 4 divisors (see below), whose sum is σ = 352512686064. Its totient is φ = 347171584500.

The previous prime is 349842135271. The next prime is 349842135367. The reversal of 349842135281 is 182531248943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 349842135281 - 2¹⁴ = 349842118897 is a prime.

It is a super-2 number, since 2×349842135281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349842135271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1335275195 + ... + 1335275456.

It is an arithmetic number, because the mean of its divisors is an integer number (88128171516).

Almost surely, 2^349842135281 is an apocalyptic number.

It is an amenable number.

349842135281 is a deficient number, since it is larger than the sum of its proper divisors (2670550783).

349842135281 is a wasteful number, since it uses less digits than its factorization.

349842135281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670550782.

The product of its digits is 1658880, while the sum is 50.

The spelling of 349842135281 in words is "three hundred forty-nine billion, eight hundred forty-two million, one hundred thirty-five thousand, two hundred eighty-one".