631231380 has 288 divisors, whose sum is σ = 2181414144. Its totient is φ = 152285184.

The previous prime is 631231361. The next prime is 631231399. The reversal of 631231380 is 83132136.

It is a happy number.

631231380 is a `hidden beast` number, since 631 + 23 + 1 + 3 + 8 + 0 = 666.

631231380 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631231361) and next prime (631231399).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6128409 + ... + 6128511.

Almost surely, 2^631231380 is an apocalyptic number.

631231380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631231380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090707072).

631231380 is an abundant number, since it is smaller than the sum of its proper divisors (1550182764).

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

631231380 is a wasteful number, since it uses less digits than its factorization.

631231380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 631231380 is about 25124.3184982200. The cubic root of 631231380 is about 857.8200512638.

The spelling of 631231380 in words is "six hundred thirty-one million, two hundred thirty-one thousand, three hundred eighty".