351631 has 8 divisors (see below), whose sum is σ = 405504. Its totient is φ = 298680.

The previous prime is 351599. The next prime is 351643. The reversal of 351631 is 136153.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 351631 - 2⁵ = 351599 is a prime.

It is a super-2 number, since 2×351631² = 247288720322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 351599 and 351608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351661) 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, 1206 + ... + 1468.

It is an arithmetic number, because the mean of its divisors is an integer number (50688).

2³⁵¹⁶³¹ is an apocalyptic number.

351631 is a deficient number, since it is larger than the sum of its proper divisors (53873).

351631 is a wasteful number, since it uses less digits than its factorization.

351631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 270, while the sum is 19.

The square root of 351631 is about 592.9848227400. The cubic root of 351631 is about 70.5822857595.

Adding to 351631 its reverse (136153), we get a palindrome (487784).

The spelling of 351631 in words is "three hundred fifty-one thousand, six hundred thirty-one".