631021323 has 8 divisors (see below), whose sum is σ = 843361936. Its totient is φ = 419680800.

The previous prime is 631021319. The next prime is 631021333. The reversal of 631021323 is 323120136.

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

It is not a de Polignac number, because 631021323 - 2² = 631021319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631021323.

It is not an unprimeable number, because it can be changed into a prime (631021333) 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, 248548 + ... + 251073.

It is an arithmetic number, because the mean of its divisors is an integer number (105420242).

Almost surely, 2^631021323 is an apocalyptic number.

631021323 is a deficient number, since it is larger than the sum of its proper divisors (212340613).

631021323 is a wasteful number, since it uses less digits than its factorization.

631021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500045.

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

The square root of 631021323 is about 25120.1377981889. The cubic root of 631021323 is about 857.7248874810.

Adding to 631021323 its reverse (323120136), we get a palindrome (954141459).

The spelling of 631021323 in words is "six hundred thirty-one million, twenty-one thousand, three hundred twenty-three".