631146285 has 144 divisors (see below), whose sum is σ = 1424142720. Its totient is φ = 252806400.

The previous prime is 631146283. The next prime is 631146293. The reversal of 631146285 is 582641136.

It is a happy number.

631146285 is a `hidden beast` number, since 631 + 14 + 6 + 2 + 8 + 5 = 666.

It is not a de Polignac number, because 631146285 - 2¹ = 631146283 is a prime.

Its product of digits (34560) is a multiple of the sum of its prime factors (640).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631146281) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1105050 + ... + 1105620.

It is an arithmetic number, because the mean of its divisors is an integer number (9889880).

Almost surely, 2^631146285 is an apocalyptic number.

It is an amenable number.

631146285 is an abundant number, since it is smaller than the sum of its proper divisors (792996435).

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

631146285 is a wasteful number, since it uses less digits than its factorization.

631146285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 626 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 631146285 is about 25122.6249623721. The cubic root of 631146285 is about 857.7815025478.

The spelling of 631146285 in words is "six hundred thirty-one million, one hundred forty-six thousand, two hundred eighty-five".