631321023 has 8 divisors (see below), whose sum is σ = 842159536. Its totient is φ = 420681600.

The previous prime is 631320953. The next prime is 631321057. The reversal of 631321023 is 320123136.

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

It is not a de Polignac number, because 631321023 - 2¹⁰ = 631319999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631321123) 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, 42208 + ... + 55173.

It is an arithmetic number, because the mean of its divisors is an integer number (105269942).

Almost surely, 2^631321023 is an apocalyptic number.

631321023 is a deficient number, since it is larger than the sum of its proper divisors (210838513).

631321023 is a wasteful number, since it uses less digits than its factorization.

631321023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99545.

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

The square root of 631321023 is about 25126.1024235754. The cubic root of 631321023 is about 857.8606565133.

Adding to 631321023 its reverse (320123136), we get a palindrome (951444159).

The spelling of 631321023 in words is "six hundred thirty-one million, three hundred twenty-one thousand, twenty-three".