631133740 has 12 divisors (see below), whose sum is σ = 1325380896. Its totient is φ = 252453488.

The previous prime is 631133677. The next prime is 631133771. The reversal of 631133740 is 47331136.

It is a happy number.

631133740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×631133740⁴ (a number of 36 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 631133699 and 631133708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15778324 + ... + 15778363.

It is an arithmetic number, because the mean of its divisors is an integer number (110448408).

Almost surely, 2^631133740 is an apocalyptic number.

It is an amenable number.

631133740 is an abundant number, since it is smaller than the sum of its proper divisors (694247156).

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

631133740 is a wasteful number, since it uses less digits than its factorization.

631133740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31556696 (or 31556694 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 631133740 is about 25122.3752857886. The cubic root of 631133740 is about 857.7758192693.

Adding to 631133740 its reverse (47331136), we get a palindrome (678464876).

The spelling of 631133740 in words is "six hundred thirty-one million, one hundred thirty-three thousand, seven hundred forty".