631326 has 16 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 205464.

The previous prime is 631307. The next prime is 631339. The reversal of 631326 is 623136.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

631326 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966 + ... + 1481.

It is an arithmetic number, because the mean of its divisors is an integer number (80784).

2⁶³¹³²⁶ is an apocalyptic number.

631326 is an abundant number, since it is smaller than the sum of its proper divisors (661218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631326 is a wasteful number, since it uses less digits than its factorization.

631326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495.

The product of its digits is 648, while the sum is 21.

The square root of 631326 is about 794.5602557390. The cubic root of 631326 is about 85.7862910813.

It can be divided in two parts, 63 and 1326, that multiplied together give a palindrome (83538).

The spelling of 631326 in words is "six hundred thirty-one thousand, three hundred twenty-six".