631321350 has 192 divisors, whose sum is σ = 1839739392. Its totient is φ = 141568000.

The previous prime is 631321261. The next prime is 631321373. The reversal of 631321350 is 53123136.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 631321350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1991392 + ... + 1991708.

It is an arithmetic number, because the mean of its divisors is an integer number (9581976).

Almost surely, 2^631321350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631321350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919869696).

631321350 is an abundant number, since it is smaller than the sum of its proper divisors (1208418042).

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

631321350 is a wasteful number, since it uses less digits than its factorization.

631321350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 631321350 is about 25126.1089307517. The cubic root of 631321350 is about 857.8608046262.

Adding to 631321350 its reverse (53123136), we get a palindrome (684444486).

The spelling of 631321350 in words is "six hundred thirty-one million, three hundred twenty-one thousand, three hundred fifty".