351999 has 8 divisors (see below), whose sum is σ = 521520. Its totient is φ = 234648.

The previous prime is 351991. The next prime is 352007. The reversal of 351999 is 999153.

It is an interprime number because it is at equal distance from previous prime (351991) and next prime (352007).

It is not a de Polignac number, because 351999 - 2³ = 351991 is a prime.

351999 is a modest number, since divided by 999 gives 351 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6492 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (65190).

2³⁵¹⁹⁹⁹ is an apocalyptic number.

351999 is a deficient number, since it is larger than the sum of its proper divisors (169521).

351999 is a wasteful number, since it uses less digits than its factorization.

351999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13046 (or 13040 counting only the distinct ones).

The product of its digits is 10935, while the sum is 36.

The square root of 351999 is about 593.2950362172. The cubic root of 351999 is about 70.6068998438.

The spelling of 351999 in words is "three hundred fifty-one thousand, nine hundred ninety-nine".