349888331521 has 4 divisors (see below), whose sum is σ = 349964349232. Its totient is φ = 349812313812.

The previous prime is 349888331483. The next prime is 349888331531. The reversal of 349888331521 is 125133888943.

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 349888331521 - 2³¹ = 347740847873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349888331531) 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, 38001951 + ... + 38011156.

It is an arithmetic number, because the mean of its divisors is an integer number (87491087308).

Almost surely, 2^349888331521 is an apocalyptic number.

It is an amenable number.

349888331521 is a deficient number, since it is larger than the sum of its proper divisors (76017711).

349888331521 is an equidigital number, since it uses as much as digits as its factorization.

349888331521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76017710.

The product of its digits is 4976640, while the sum is 55.

The spelling of 349888331521 in words is "three hundred forty-nine billion, eight hundred eighty-eight million, three hundred thirty-one thousand, five hundred twenty-one".