351891 has 8 divisors (see below), whose sum is σ = 521360. Its totient is φ = 234576.

The previous prime is 351887. The next prime is 351913. The reversal of 351891 is 198153.

351891 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 351891 - 2² = 351887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 13033 = 351891 / (3 + 5 + 1 + 8 + 9 + 1).

It is an Ulam number.

It is a Duffinian number.

351891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (351811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6490 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (65170).

2³⁵¹⁸⁹¹ is an apocalyptic number.

351891 is a deficient number, since it is larger than the sum of its proper divisors (169469).

351891 is a wasteful number, since it uses less digits than its factorization.

351891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13042 (or 13036 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 351891 is about 593.2040121240. The cubic root of 351891 is about 70.5996779244.

The spelling of 351891 in words is "three hundred fifty-one thousand, eight hundred ninety-one".