• 351 can be written using four 4's:

351 has 8 divisors (see below), whose sum is σ = 560. Its totient is φ = 216.

The previous prime is 349. The next prime is 353. The reversal of 351 is 153.

351 is nontrivially palindromic in base 14.

351 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

351 is a nontrivial binomial coefficient, being equal to C(27, 2).

It is an interprime number because it is at equal distance from previous prime (349) and next prime (353).

It is not a de Polignac number, because 351 - 2^{1} = 349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

351 is an undulating number in base 14.

It is a plaindrome in base 4, base 11 and base 16.

It is a nialpdrome in base 3, base 9 and base 13.

It is a zygodrome in base 3 and base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 33.

It is an arithmetic number, because the mean of its divisors is an integer number (70).

351 is the 26-th triangular number.

351 is a deficient number, since it is larger than the sum of its proper divisors (209).

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

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

The sum of its prime factors is 22 (or 16 counting only the distinct ones).

The product of its digits is 15, while the sum is 9.

The square root of 351 is about 18.7349939952. The cubic root of 351 is about 7.0540040632.

It can be divided in two parts, 35 and 1, that added together give a triangular number (36 = T_{8}).

The spelling of 351 in words is "three hundred fifty-one", and thus it is an aban number.

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