351585878231 has 4 divisors (see below), whose sum is σ = 401812432272. Its totient is φ = 301359324192.

The previous prime is 351585878227. The next prime is 351585878257. The reversal of 351585878231 is 132878585153.

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

It is a cyclic number.

It is not a de Polignac number, because 351585878231 - 2² = 351585878227 is a prime.

It is a super-2 number, since 2×351585878231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351585878291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25113277010 + ... + 25113277023.

It is an arithmetic number, because the mean of its divisors is an integer number (100453108068).

Almost surely, 2^351585878231 is an apocalyptic number.

351585878231 is a deficient number, since it is larger than the sum of its proper divisors (50226554041).

351585878231 is an equidigital number, since it uses as much as digits as its factorization.

351585878231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50226554040.

The product of its digits is 8064000, while the sum is 56.

The spelling of 351585878231 in words is "three hundred fifty-one billion, five hundred eighty-five million, eight hundred seventy-eight thousand, two hundred thirty-one".